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Finding the Fourth Proportional to 390,124.68, 585,207.29 and 123,906.03

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Solution

The fourth proportional to 390,124.68, 585,207.29 and 123,906.03 is: 185,865.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,124.68 : 585,207.29 = 123,906.03 : x
  2. Step 2: Convert to fraction form
    390,124.68/585,207.29 = 123,906.03/x
  3. Step 3: Cross multiply
    390,124.68x = 585,207.29 × 123,906.03
  4. Step 4: Simplify right side
    390,124.68x = 72,510,711,411.43
  5. Step 5: Solve for x
    x = 72,510,711,411.43/390,124.68
  6. Step 6: Final answer
    x = 185,865.48

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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.