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Finding the Fourth Proportional to 102,111.20, 153,312.60 and 79,949.60

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Solution

The fourth proportional to 102,111.20, 153,312.60 and 79,949.60 is: 120,038.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,111.20 : 153,312.60 = 79,949.60 : x
  2. Step 2: Convert to fraction form
    102,111.20/153,312.60 = 79,949.60/x
  3. Step 3: Cross multiply
    102,111.20x = 153,312.60 × 79,949.60
  4. Step 4: Simplify right side
    102,111.20x = 12,257,281,044.96
  5. Step 5: Solve for x
    x = 12,257,281,044.96/102,111.20
  6. Step 6: Final answer
    x = 120,038.56

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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.