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Finding the Fourth Proportional to 387,655.61, 581,483.45 and 121,436.87

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Solution

The fourth proportional to 387,655.61, 581,483.45 and 121,436.87 is: 182,155.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,655.61 : 581,483.45 = 121,436.87 : x
  2. Step 2: Convert to fraction form
    387,655.61/581,483.45 = 121,436.87/x
  3. Step 3: Cross multiply
    387,655.61x = 581,483.45 × 121,436.87
  4. Step 4: Simplify right side
    387,655.61x = 70,613,527,520.98
  5. Step 5: Solve for x
    x = 70,613,527,520.98/387,655.61
  6. Step 6: Final answer
    x = 182,155.31

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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.