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Finding the Fourth Proportional to 387,843.68, 581,700.72 and 107,389.28

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Solution

The fourth proportional to 387,843.68, 581,700.72 and 107,389.28 is: 161,065.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,843.68 : 581,700.72 = 107,389.28 : x
  2. Step 2: Convert to fraction form
    387,843.68/581,700.72 = 107,389.28/x
  3. Step 3: Cross multiply
    387,843.68x = 581,700.72 × 107,389.28
  4. Step 4: Simplify right side
    387,843.68x = 62,468,421,496.28
  5. Step 5: Solve for x
    x = 62,468,421,496.28/387,843.68
  6. Step 6: Final answer
    x = 161,065.98

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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.