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Finding the Fourth Proportional to 387,379.47, 581,102.70 and 106,896.72

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Solution

The fourth proportional to 387,379.47, 581,102.70 and 106,896.72 is: 160,354.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,379.47 : 581,102.70 = 106,896.72 : x
  2. Step 2: Convert to fraction form
    387,379.47/581,102.70 = 106,896.72/x
  3. Step 3: Cross multiply
    387,379.47x = 581,102.70 × 106,896.72
  4. Step 4: Simplify right side
    387,379.47x = 62,117,972,613.14
  5. Step 5: Solve for x
    x = 62,117,972,613.14/387,379.47
  6. Step 6: Final answer
    x = 160,354.32

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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.