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Finding the Fourth Proportional to 84,902.40, 127,489.60 and 67,516.80

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Solution

The fourth proportional to 84,902.40, 127,489.60 and 67,516.80 is: 101,383.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,902.40 : 127,489.60 = 67,516.80 : x
  2. Step 2: Convert to fraction form
    84,902.40/127,489.60 = 67,516.80/x
  3. Step 3: Cross multiply
    84,902.40x = 127,489.60 × 67,516.80
  4. Step 4: Simplify right side
    84,902.40x = 8,607,689,825.28
  5. Step 5: Solve for x
    x = 8,607,689,825.28/84,902.40
  6. Step 6: Final answer
    x = 101,383.35

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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.