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Finding the Fourth Proportional to 84,812.52, 127,768.80 and 80,686.44

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Solution

The fourth proportional to 84,812.52, 127,768.80 and 80,686.44 is: 121,552.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,812.52 : 127,768.80 = 80,686.44 : x
  2. Step 2: Convert to fraction form
    84,812.52/127,768.80 = 80,686.44/x
  3. Step 3: Cross multiply
    84,812.52x = 127,768.80 × 80,686.44
  4. Step 4: Simplify right side
    84,812.52x = 10,309,209,615.07
  5. Step 5: Solve for x
    x = 10,309,209,615.07/84,812.52
  6. Step 6: Final answer
    x = 121,552.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.