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Finding the Fourth Proportional to 99,718.26, 137,608.80 and 57,279.54

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Solution

The fourth proportional to 99,718.26, 137,608.80 and 57,279.54 is: 79,044.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,718.26 : 137,608.80 = 57,279.54 : x
  2. Step 2: Convert to fraction form
    99,718.26/137,608.80 = 57,279.54/x
  3. Step 3: Cross multiply
    99,718.26x = 137,608.80 × 57,279.54
  4. Step 4: Simplify right side
    99,718.26x = 7,882,168,763.95
  5. Step 5: Solve for x
    x = 7,882,168,763.95/99,718.26
  6. Step 6: Final answer
    x = 79,044.39

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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.