Home / 127,938.20-191,648.10-72,469.40

Finding the Fourth Proportional to 127,938.20, 191,648.10 and 72,469.40

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Solution

The fourth proportional to 127,938.20, 191,648.10 and 72,469.40 is: 108,557.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,938.20 : 191,648.10 = 72,469.40 : x
  2. Step 2: Convert to fraction form
    127,938.20/191,648.10 = 72,469.40/x
  3. Step 3: Cross multiply
    127,938.20x = 191,648.10 × 72,469.40
  4. Step 4: Simplify right side
    127,938.20x = 13,888,622,818.14
  5. Step 5: Solve for x
    x = 13,888,622,818.14/127,938.20
  6. Step 6: Final answer
    x = 108,557.28

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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.