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Finding the Fourth Proportional to 99,879.39, 137,599.02 and 69,609.69

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Solution

The fourth proportional to 99,879.39, 137,599.02 and 69,609.69 is: 95,897.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,879.39 : 137,599.02 = 69,609.69 : x
  2. Step 2: Convert to fraction form
    99,879.39/137,599.02 = 69,609.69/x
  3. Step 3: Cross multiply
    99,879.39x = 137,599.02 × 69,609.69
  4. Step 4: Simplify right side
    99,879.39x = 9,578,225,126.50
  5. Step 5: Solve for x
    x = 9,578,225,126.50/99,879.39
  6. Step 6: Final answer
    x = 95,897.91

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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.