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Finding the Fourth Proportional to 387,434.96, 581,151.56 and 103,125.56

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Solution

The fourth proportional to 387,434.96, 581,151.56 and 103,125.56 is: 154,688.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,434.96 : 581,151.56 = 103,125.56 : x
  2. Step 2: Convert to fraction form
    387,434.96/581,151.56 = 103,125.56/x
  3. Step 3: Cross multiply
    387,434.96x = 581,151.56 × 103,125.56
  4. Step 4: Simplify right side
    387,434.96x = 59,931,580,069.87
  5. Step 5: Solve for x
    x = 59,931,580,069.87/387,434.96
  6. Step 6: Final answer
    x = 154,688.11

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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.