Home / 100,437.20-138,602.95-55,115.94

Finding the Fourth Proportional to 100,437.20, 138,602.95 and 55,115.94

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Solution

The fourth proportional to 100,437.20, 138,602.95 and 55,115.94 is: 76,059.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,437.20 : 138,602.95 = 55,115.94 : x
  2. Step 2: Convert to fraction form
    100,437.20/138,602.95 = 55,115.94/x
  3. Step 3: Cross multiply
    100,437.20x = 138,602.95 × 55,115.94
  4. Step 4: Simplify right side
    100,437.20x = 7,639,231,876.02
  5. Step 5: Solve for x
    x = 7,639,231,876.02/100,437.20
  6. Step 6: Final answer
    x = 76,059.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.