Home / 100,470.17-138,641.22-55,140.95

Finding the Fourth Proportional to 100,470.17, 138,641.22 and 55,140.95

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Solution

The fourth proportional to 100,470.17, 138,641.22 and 55,140.95 is: 76,090.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,470.17 : 138,641.22 = 55,140.95 : x
  2. Step 2: Convert to fraction form
    100,470.17/138,641.22 = 55,140.95/x
  3. Step 3: Cross multiply
    100,470.17x = 138,641.22 × 55,140.95
  4. Step 4: Simplify right side
    100,470.17x = 7,644,808,926.56
  5. Step 5: Solve for x
    x = 7,644,808,926.56/100,470.17
  6. Step 6: Final answer
    x = 76,090.33

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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.