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Finding the Fourth Proportional to 387,888.76, 581,833.86 and 121,669.92

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Solution

The fourth proportional to 387,888.76, 581,833.86 and 121,669.92 is: 182,505.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,888.76 : 581,833.86 = 121,669.92 : x
  2. Step 2: Convert to fraction form
    387,888.76/581,833.86 = 121,669.92/x
  3. Step 3: Cross multiply
    387,888.76x = 581,833.86 × 121,669.92
  4. Step 4: Simplify right side
    387,888.76x = 70,791,679,199.49
  5. Step 5: Solve for x
    x = 70,791,679,199.49/387,888.76
  6. Step 6: Final answer
    x = 182,505.11

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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.