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Finding the Fourth Proportional to 127,825.20, 191,737.80 and 90,500.40

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Solution

The fourth proportional to 127,825.20, 191,737.80 and 90,500.40 is: 135,750.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,825.20 : 191,737.80 = 90,500.40 : x
  2. Step 2: Convert to fraction form
    127,825.20/191,737.80 = 90,500.40/x
  3. Step 3: Cross multiply
    127,825.20x = 191,737.80 × 90,500.40
  4. Step 4: Simplify right side
    127,825.20x = 17,352,347,595.12
  5. Step 5: Solve for x
    x = 17,352,347,595.12/127,825.20
  6. Step 6: Final answer
    x = 135,750.60

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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.