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Finding the Fourth Proportional to 102,648.30, 153,972.45 and 75,000.30

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Solution

The fourth proportional to 102,648.30, 153,972.45 and 75,000.30 is: 112,500.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,648.30 : 153,972.45 = 75,000.30 : x
  2. Step 2: Convert to fraction form
    102,648.30/153,972.45 = 75,000.30/x
  3. Step 3: Cross multiply
    102,648.30x = 153,972.45 × 75,000.30
  4. Step 4: Simplify right side
    102,648.30x = 11,547,979,941.74
  5. Step 5: Solve for x
    x = 11,547,979,941.74/102,648.30
  6. Step 6: Final answer
    x = 112,500.45

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.