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Finding the Fourth Proportional to 84,836.80, 127,255.20 and 77,060.80

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Solution

The fourth proportional to 84,836.80, 127,255.20 and 77,060.80 is: 115,591.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,836.80 : 127,255.20 = 77,060.80 : x
  2. Step 2: Convert to fraction form
    84,836.80/127,255.20 = 77,060.80/x
  3. Step 3: Cross multiply
    84,836.80x = 127,255.20 × 77,060.80
  4. Step 4: Simplify right side
    84,836.80x = 9,806,387,516.16
  5. Step 5: Solve for x
    x = 9,806,387,516.16/84,836.80
  6. Step 6: Final answer
    x = 115,591.20

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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.