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Finding the Fourth Proportional to 101,433.60, 152,150.40 and 85,687.20

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Solution

The fourth proportional to 101,433.60, 152,150.40 and 85,687.20 is: 128,530.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,433.60 : 152,150.40 = 85,687.20 : x
  2. Step 2: Convert to fraction form
    101,433.60/152,150.40 = 85,687.20/x
  3. Step 3: Cross multiply
    101,433.60x = 152,150.40 × 85,687.20
  4. Step 4: Simplify right side
    101,433.60x = 13,037,341,754.88
  5. Step 5: Solve for x
    x = 13,037,341,754.88/101,433.60
  6. Step 6: Final answer
    x = 128,530.80

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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.