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Finding the Fourth Proportional to 127,989.60, 191,984.40 and 72,002.40

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Solution

The fourth proportional to 127,989.60, 191,984.40 and 72,002.40 is: 108,003.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,989.60 : 191,984.40 = 72,002.40 : x
  2. Step 2: Convert to fraction form
    127,989.60/191,984.40 = 72,002.40/x
  3. Step 3: Cross multiply
    127,989.60x = 191,984.40 × 72,002.40
  4. Step 4: Simplify right side
    127,989.60x = 13,823,337,562.56
  5. Step 5: Solve for x
    x = 13,823,337,562.56/127,989.60
  6. Step 6: Final answer
    x = 108,003.60

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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.