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Finding the Fourth Proportional to 84,854.40, 127,281.60 and 54,916.80

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Solution

The fourth proportional to 84,854.40, 127,281.60 and 54,916.80 is: 82,375.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,854.40 : 127,281.60 = 54,916.80 : x
  2. Step 2: Convert to fraction form
    84,854.40/127,281.60 = 54,916.80/x
  3. Step 3: Cross multiply
    84,854.40x = 127,281.60 × 54,916.80
  4. Step 4: Simplify right side
    84,854.40x = 6,989,898,170.88
  5. Step 5: Solve for x
    x = 6,989,898,170.88/84,854.40
  6. Step 6: Final answer
    x = 82,375.20

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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.