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Finding the Fourth Proportional to 91,726.90, 137,590.35 and 70,965.30

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Solution

The fourth proportional to 91,726.90, 137,590.35 and 70,965.30 is: 106,447.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,726.90 : 137,590.35 = 70,965.30 : x
  2. Step 2: Convert to fraction form
    91,726.90/137,590.35 = 70,965.30/x
  3. Step 3: Cross multiply
    91,726.90x = 137,590.35 × 70,965.30
  4. Step 4: Simplify right side
    91,726.90x = 9,764,140,464.86
  5. Step 5: Solve for x
    x = 9,764,140,464.86/91,726.90
  6. Step 6: Final answer
    x = 106,447.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.