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Finding the Fourth Proportional to 85,311.32, 127,966.95 and 45,814.10

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Solution

The fourth proportional to 85,311.32, 127,966.95 and 45,814.10 is: 68,721.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,311.32 : 127,966.95 = 45,814.10 : x
  2. Step 2: Convert to fraction form
    85,311.32/127,966.95 = 45,814.10/x
  3. Step 3: Cross multiply
    85,311.32x = 127,966.95 × 45,814.10
  4. Step 4: Simplify right side
    85,311.32x = 5,862,690,004.16
  5. Step 5: Solve for x
    x = 5,862,690,004.16/85,311.32
  6. Step 6: Final answer
    x = 68,721.13

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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.