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Finding the Fourth Proportional to 84,312.40, 126,468.60 and 54,374.80

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Solution

The fourth proportional to 84,312.40, 126,468.60 and 54,374.80 is: 81,562.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,312.40 : 126,468.60 = 54,374.80 : x
  2. Step 2: Convert to fraction form
    84,312.40/126,468.60 = 54,374.80/x
  3. Step 3: Cross multiply
    84,312.40x = 126,468.60 × 54,374.80
  4. Step 4: Simplify right side
    84,312.40x = 6,876,704,831.28
  5. Step 5: Solve for x
    x = 6,876,704,831.28/84,312.40
  6. Step 6: Final answer
    x = 81,562.20

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1.5x scale

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.