Home / 129,023.88-178,053.56-72,435.25

Finding the Fourth Proportional to 129,023.88, 178,053.56 and 72,435.25

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Solution

The fourth proportional to 129,023.88, 178,053.56 and 72,435.25 is: 99,960.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,023.88 : 178,053.56 = 72,435.25 : x
  2. Step 2: Convert to fraction form
    129,023.88/178,053.56 = 72,435.25/x
  3. Step 3: Cross multiply
    129,023.88x = 178,053.56 × 72,435.25
  4. Step 4: Simplify right side
    129,023.88x = 12,897,354,131.99
  5. Step 5: Solve for x
    x = 12,897,354,131.99/129,023.88
  6. Step 6: Final answer
    x = 99,960.98

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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.