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Finding the Fourth Proportional to 387,864.72, 581,800.32 and 121,666.32

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Solution

The fourth proportional to 387,864.72, 581,800.32 and 121,666.32 is: 182,500.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,864.72 : 581,800.32 = 121,666.32 : x
  2. Step 2: Convert to fraction form
    387,864.72/581,800.32 = 121,666.32/x
  3. Step 3: Cross multiply
    387,864.72x = 581,800.32 × 121,666.32
  4. Step 4: Simplify right side
    387,864.72x = 70,785,503,909.22
  5. Step 5: Solve for x
    x = 70,785,503,909.22/387,864.72
  6. Step 6: Final answer
    x = 182,500.50

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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.