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Finding the Fourth Proportional to 91,821.80, 137,751.90 and 29,498.60

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Solution

The fourth proportional to 91,821.80, 137,751.90 and 29,498.60 is: 44,254.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,821.80 : 137,751.90 = 29,498.60 : x
  2. Step 2: Convert to fraction form
    91,821.80/137,751.90 = 29,498.60/x
  3. Step 3: Cross multiply
    91,821.80x = 137,751.90 × 29,498.60
  4. Step 4: Simplify right side
    91,821.80x = 4,063,488,197.34
  5. Step 5: Solve for x
    x = 4,063,488,197.34/91,821.80
  6. Step 6: Final answer
    x = 44,254.07

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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.