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Finding the Fourth Proportional to 126,070.40, 173,985.40 and 72,372.80

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Solution

The fourth proportional to 126,070.40, 173,985.40 and 72,372.80 is: 99,879.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,070.40 : 173,985.40 = 72,372.80 : x
  2. Step 2: Convert to fraction form
    126,070.40/173,985.40 = 72,372.80/x
  3. Step 3: Cross multiply
    126,070.40x = 173,985.40 × 72,372.80
  4. Step 4: Simplify right side
    126,070.40x = 12,591,810,557.12
  5. Step 5: Solve for x
    x = 12,591,810,557.12/126,070.40
  6. Step 6: Final answer
    x = 99,879.20

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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.