Home / 80,673.40-121,010.10-72,508.60

Finding the Fourth Proportional to 80,673.40, 121,010.10 and 72,508.60

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Solution

The fourth proportional to 80,673.40, 121,010.10 and 72,508.60 is: 108,762.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,673.40 : 121,010.10 = 72,508.60 : x
  2. Step 2: Convert to fraction form
    80,673.40/121,010.10 = 72,508.60/x
  3. Step 3: Cross multiply
    80,673.40x = 121,010.10 × 72,508.60
  4. Step 4: Simplify right side
    80,673.40x = 8,774,272,936.86
  5. Step 5: Solve for x
    x = 8,774,272,936.86/80,673.40
  6. Step 6: Final answer
    x = 108,762.90

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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.