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Finding the Fourth Proportional to 387,384.50, 581,110.20 and 106,901.72

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Solution

The fourth proportional to 387,384.50, 581,110.20 and 106,901.72 is: 160,361.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,384.50 : 581,110.20 = 106,901.72 : x
  2. Step 2: Convert to fraction form
    387,384.50/581,110.20 = 106,901.72/x
  3. Step 3: Cross multiply
    387,384.50x = 581,110.20 × 106,901.72
  4. Step 4: Simplify right side
    387,384.50x = 62,121,679,889.54
  5. Step 5: Solve for x
    x = 62,121,679,889.54/387,384.50
  6. Step 6: Final answer
    x = 160,361.81

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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.