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Finding the Fourth Proportional to 101,387.80, 139,909.51 and 56,063.07

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Solution

The fourth proportional to 101,387.80, 139,909.51 and 56,063.07 is: 77,363.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,387.80 : 139,909.51 = 56,063.07 : x
  2. Step 2: Convert to fraction form
    101,387.80/139,909.51 = 56,063.07/x
  3. Step 3: Cross multiply
    101,387.80x = 139,909.51 × 56,063.07
  4. Step 4: Simplify right side
    101,387.80x = 7,843,756,722.87
  5. Step 5: Solve for x
    x = 7,843,756,722.87/101,387.80
  6. Step 6: Final answer
    x = 77,363.91

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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.