Home / 100,531.04-138,732.95-55,211.94

Finding the Fourth Proportional to 100,531.04, 138,732.95 and 55,211.94

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Solution

The fourth proportional to 100,531.04, 138,732.95 and 55,211.94 is: 76,192.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,531.04 : 138,732.95 = 55,211.94 : x
  2. Step 2: Convert to fraction form
    100,531.04/138,732.95 = 55,211.94/x
  3. Step 3: Cross multiply
    100,531.04x = 138,732.95 × 55,211.94
  4. Step 4: Simplify right side
    100,531.04x = 7,659,715,449.45
  5. Step 5: Solve for x
    x = 7,659,715,449.45/100,531.04
  6. Step 6: Final answer
    x = 76,192.55

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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.