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Finding the Fourth Proportional to 306,781.92, 459,785.16 and 138,122.64

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Solution

The fourth proportional to 306,781.92, 459,785.16 and 138,122.64 is: 207,009.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,781.92 : 459,785.16 = 138,122.64 : x
  2. Step 2: Convert to fraction form
    306,781.92/459,785.16 = 138,122.64/x
  3. Step 3: Cross multiply
    306,781.92x = 459,785.16 × 138,122.64
  4. Step 4: Simplify right side
    306,781.92x = 63,506,740,132.02
  5. Step 5: Solve for x
    x = 63,506,740,132.02/306,781.92
  6. Step 6: Final answer
    x = 207,009.40

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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.