Home / 105,432.12-157,972.68-74,201.76

Finding the Fourth Proportional to 105,432.12, 157,972.68 and 74,201.76

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Solution

The fourth proportional to 105,432.12, 157,972.68 and 74,201.76 is: 111,179.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,432.12 : 157,972.68 = 74,201.76 : x
  2. Step 2: Convert to fraction form
    105,432.12/157,972.68 = 74,201.76/x
  3. Step 3: Cross multiply
    105,432.12x = 157,972.68 × 74,201.76
  4. Step 4: Simplify right side
    105,432.12x = 11,721,850,887.92
  5. Step 5: Solve for x
    x = 11,721,850,887.92/105,432.12
  6. Step 6: Final answer
    x = 111,179.13

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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.