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Finding the Fourth Proportional to 85,200.70, 127,801.05 and 53,707.90

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Solution

The fourth proportional to 85,200.70, 127,801.05 and 53,707.90 is: 80,561.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,200.70 : 127,801.05 = 53,707.90 : x
  2. Step 2: Convert to fraction form
    85,200.70/127,801.05 = 53,707.90/x
  3. Step 3: Cross multiply
    85,200.70x = 127,801.05 × 53,707.90
  4. Step 4: Simplify right side
    85,200.70x = 6,863,926,013.30
  5. Step 5: Solve for x
    x = 6,863,926,013.30/85,200.70
  6. Step 6: Final answer
    x = 80,561.85

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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.