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Finding the Fourth Proportional to 387,357.40, 581,069.58 and 106,874.65

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Solution

The fourth proportional to 387,357.40, 581,069.58 and 106,874.65 is: 160,321.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,357.40 : 581,069.58 = 106,874.65 : x
  2. Step 2: Convert to fraction form
    387,357.40/581,069.58 = 106,874.65/x
  3. Step 3: Cross multiply
    387,357.40x = 581,069.58 × 106,874.65
  4. Step 4: Simplify right side
    387,357.40x = 62,101,607,988.15
  5. Step 5: Solve for x
    x = 62,101,607,988.15/387,357.40
  6. Step 6: Final answer
    x = 160,321.21

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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.