Home / 99,421.57-137,019.23-93,108.43

Finding the Fourth Proportional to 99,421.57, 137,019.23 and 93,108.43

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Solution

The fourth proportional to 99,421.57, 137,019.23 and 93,108.43 is: 128,318.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,421.57 : 137,019.23 = 93,108.43 : x
  2. Step 2: Convert to fraction form
    99,421.57/137,019.23 = 93,108.43/x
  3. Step 3: Cross multiply
    99,421.57x = 137,019.23 × 93,108.43
  4. Step 4: Simplify right side
    99,421.57x = 12,757,644,919.57
  5. Step 5: Solve for x
    x = 12,757,644,919.57/99,421.57
  6. Step 6: Final answer
    x = 128,318.68

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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.