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Finding the Fourth Proportional to 99,708.50, 137,648.51 and 76,996.51

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Solution

The fourth proportional to 99,708.50, 137,648.51 and 76,996.51 is: 106,294.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,708.50 : 137,648.51 = 76,996.51 : x
  2. Step 2: Convert to fraction form
    99,708.50/137,648.51 = 76,996.51/x
  3. Step 3: Cross multiply
    99,708.50x = 137,648.51 × 76,996.51
  4. Step 4: Simplify right side
    99,708.50x = 10,598,454,869.44
  5. Step 5: Solve for x
    x = 10,598,454,869.44/99,708.50
  6. Step 6: Final answer
    x = 106,294.39

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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.