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Finding the Fourth Proportional to 96,438.80, 145,003.80 and 81,232.40

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Solution

The fourth proportional to 96,438.80, 145,003.80 and 81,232.40 is: 122,139.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,438.80 : 145,003.80 = 81,232.40 : x
  2. Step 2: Convert to fraction form
    96,438.80/145,003.80 = 81,232.40/x
  3. Step 3: Cross multiply
    96,438.80x = 145,003.80 × 81,232.40
  4. Step 4: Simplify right side
    96,438.80x = 11,779,006,683.12
  5. Step 5: Solve for x
    x = 11,779,006,683.12/96,438.80
  6. Step 6: Final answer
    x = 122,139.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.