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Finding the Fourth Proportional to 85,001.20, 127,501.80 and 75,159.70

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Solution

The fourth proportional to 85,001.20, 127,501.80 and 75,159.70 is: 112,739.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,001.20 : 127,501.80 = 75,159.70 : x
  2. Step 2: Convert to fraction form
    85,001.20/127,501.80 = 75,159.70/x
  3. Step 3: Cross multiply
    85,001.20x = 127,501.80 × 75,159.70
  4. Step 4: Simplify right side
    85,001.20x = 9,582,997,037.46
  5. Step 5: Solve for x
    x = 9,582,997,037.46/85,001.20
  6. Step 6: Final answer
    x = 112,739.55

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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.