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Finding the Fourth Proportional to 139,132.65, 192,001.99 and 77,878.87

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Solution

The fourth proportional to 139,132.65, 192,001.99 and 77,878.87 is: 107,472.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,132.65 : 192,001.99 = 77,878.87 : x
  2. Step 2: Convert to fraction form
    139,132.65/192,001.99 = 77,878.87/x
  3. Step 3: Cross multiply
    139,132.65x = 192,001.99 × 77,878.87
  4. Step 4: Simplify right side
    139,132.65x = 14,952,898,018.95
  5. Step 5: Solve for x
    x = 14,952,898,018.95/139,132.65
  6. Step 6: Final answer
    x = 107,472.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.