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Finding the Fourth Proportional to 243,688.30, 365,532.45 and 85,864.30

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Solution

The fourth proportional to 243,688.30, 365,532.45 and 85,864.30 is: 128,796.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,688.30 : 365,532.45 = 85,864.30 : x
  2. Step 2: Convert to fraction form
    243,688.30/365,532.45 = 85,864.30/x
  3. Step 3: Cross multiply
    243,688.30x = 365,532.45 × 85,864.30
  4. Step 4: Simplify right side
    243,688.30x = 31,386,187,946.54
  5. Step 5: Solve for x
    x = 31,386,187,946.54/243,688.30
  6. Step 6: Final answer
    x = 128,796.45

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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.