Home / 99,729.08-137,436.18-71,385.56

Finding the Fourth Proportional to 99,729.08, 137,436.18 and 71,385.56

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Solution

The fourth proportional to 99,729.08, 137,436.18 and 71,385.56 is: 98,376.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,729.08 : 137,436.18 = 71,385.56 : x
  2. Step 2: Convert to fraction form
    99,729.08/137,436.18 = 71,385.56/x
  3. Step 3: Cross multiply
    99,729.08x = 137,436.18 × 71,385.56
  4. Step 4: Simplify right side
    99,729.08x = 9,810,958,673.56
  5. Step 5: Solve for x
    x = 9,810,958,673.56/99,729.08
  6. Step 6: Final answer
    x = 98,376.11

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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.