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Finding the Fourth Proportional to 85,124.70, 127,687.05 and 72,002.70

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Solution

The fourth proportional to 85,124.70, 127,687.05 and 72,002.70 is: 108,004.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,124.70 : 127,687.05 = 72,002.70 : x
  2. Step 2: Convert to fraction form
    85,124.70/127,687.05 = 72,002.70/x
  3. Step 3: Cross multiply
    85,124.70x = 127,687.05 × 72,002.70
  4. Step 4: Simplify right side
    85,124.70x = 9,193,812,355.04
  5. Step 5: Solve for x
    x = 9,193,812,355.04/85,124.70
  6. Step 6: Final answer
    x = 108,004.05

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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.