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Finding the Fourth Proportional to 85,073.91, 127,689.80 and 42,983.56

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Solution

The fourth proportional to 85,073.91, 127,689.80 and 42,983.56 is: 64,515.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,073.91 : 127,689.80 = 42,983.56 : x
  2. Step 2: Convert to fraction form
    85,073.91/127,689.80 = 42,983.56/x
  3. Step 3: Cross multiply
    85,073.91x = 127,689.80 × 42,983.56
  4. Step 4: Simplify right side
    85,073.91x = 5,488,561,541.24
  5. Step 5: Solve for x
    x = 5,488,561,541.24/85,073.91
  6. Step 6: Final answer
    x = 64,515.22

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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.