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Finding the Fourth Proportional to 147,335.20, 220,419.60 and 127,830.40

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Solution

The fourth proportional to 147,335.20, 220,419.60 and 127,830.40 is: 191,239.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,335.20 : 220,419.60 = 127,830.40 : x
  2. Step 2: Convert to fraction form
    147,335.20/220,419.60 = 127,830.40/x
  3. Step 3: Cross multiply
    147,335.20x = 220,419.60 × 127,830.40
  4. Step 4: Simplify right side
    147,335.20x = 28,176,325,635.84
  5. Step 5: Solve for x
    x = 28,176,325,635.84/147,335.20
  6. Step 6: Final answer
    x = 191,239.61

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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.