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Finding the Fourth Proportional to 100,478.88, 138,655.83 and 58,034.88

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Solution

The fourth proportional to 100,478.88, 138,655.83 and 58,034.88 is: 80,085.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,478.88 : 138,655.83 = 58,034.88 : x
  2. Step 2: Convert to fraction form
    100,478.88/138,655.83 = 58,034.88/x
  3. Step 3: Cross multiply
    100,478.88x = 138,655.83 × 58,034.88
  4. Step 4: Simplify right side
    100,478.88x = 8,046,874,455.35
  5. Step 5: Solve for x
    x = 8,046,874,455.35/100,478.88
  6. Step 6: Final answer
    x = 80,085.23

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1.5x scale

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.