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Finding the Fourth Proportional to 98,689.87, 136,105.95 and 69,952.69

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Solution

The fourth proportional to 98,689.87, 136,105.95 and 69,952.69 is: 96,473.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,689.87 : 136,105.95 = 69,952.69 : x
  2. Step 2: Convert to fraction form
    98,689.87/136,105.95 = 69,952.69/x
  3. Step 3: Cross multiply
    98,689.87x = 136,105.95 × 69,952.69
  4. Step 4: Simplify right side
    98,689.87x = 9,520,977,327.51
  5. Step 5: Solve for x
    x = 9,520,977,327.51/98,689.87
  6. Step 6: Final answer
    x = 96,473.70

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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.