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Finding the Fourth Proportional to 84,713.88, 127,038.42 and 28,538.76

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Solution

The fourth proportional to 84,713.88, 127,038.42 and 28,538.76 is: 42,797.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,713.88 : 127,038.42 = 28,538.76 : x
  2. Step 2: Convert to fraction form
    84,713.88/127,038.42 = 28,538.76/x
  3. Step 3: Cross multiply
    84,713.88x = 127,038.42 × 28,538.76
  4. Step 4: Simplify right side
    84,713.88x = 3,625,518,979.16
  5. Step 5: Solve for x
    x = 3,625,518,979.16/84,713.88
  6. Step 6: Final answer
    x = 42,797.22

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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.