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Finding the Fourth Proportional to 84,728.52, 127,121.94 and 38,014.20

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Solution

The fourth proportional to 84,728.52, 127,121.94 and 38,014.20 is: 57,034.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,728.52 : 127,121.94 = 38,014.20 : x
  2. Step 2: Convert to fraction form
    84,728.52/127,121.94 = 38,014.20/x
  3. Step 3: Cross multiply
    84,728.52x = 127,121.94 × 38,014.20
  4. Step 4: Simplify right side
    84,728.52x = 4,832,438,851.55
  5. Step 5: Solve for x
    x = 4,832,438,851.55/84,728.52
  6. Step 6: Final answer
    x = 57,034.38

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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.