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Finding the Fourth Proportional to 99,381.59, 137,150.19 and 56,948.31

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Solution

The fourth proportional to 99,381.59, 137,150.19 and 56,948.31 is: 78,590.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,381.59 : 137,150.19 = 56,948.31 : x
  2. Step 2: Convert to fraction form
    99,381.59/137,150.19 = 56,948.31/x
  3. Step 3: Cross multiply
    99,381.59x = 137,150.19 × 56,948.31
  4. Step 4: Simplify right side
    99,381.59x = 7,810,471,536.68
  5. Step 5: Solve for x
    x = 7,810,471,536.68/99,381.59
  6. Step 6: Final answer
    x = 78,590.73

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1.5x scale

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.