Home / 127,989.20-191,724.60-72,520.40

Finding the Fourth Proportional to 127,989.20, 191,724.60 and 72,520.40

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Solution

The fourth proportional to 127,989.20, 191,724.60 and 72,520.40 is: 108,633.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,989.20 : 191,724.60 = 72,520.40 : x
  2. Step 2: Convert to fraction form
    127,989.20/191,724.60 = 72,520.40/x
  3. Step 3: Cross multiply
    127,989.20x = 191,724.60 × 72,520.40
  4. Step 4: Simplify right side
    127,989.20x = 13,903,944,681.84
  5. Step 5: Solve for x
    x = 13,903,944,681.84/127,989.20
  6. Step 6: Final answer
    x = 108,633.73

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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.