Home / 99,728.08-137,434.80-71,384.56

Finding the Fourth Proportional to 99,728.08, 137,434.80 and 71,384.56

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Solution

The fourth proportional to 99,728.08, 137,434.80 and 71,384.56 is: 98,374.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,728.08 : 137,434.80 = 71,384.56 : x
  2. Step 2: Convert to fraction form
    99,728.08/137,434.80 = 71,384.56/x
  3. Step 3: Cross multiply
    99,728.08x = 137,434.80 × 71,384.56
  4. Step 4: Simplify right side
    99,728.08x = 9,810,722,726.69
  5. Step 5: Solve for x
    x = 9,810,722,726.69/99,728.08
  6. Step 6: Final answer
    x = 98,374.73

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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.