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Finding the Fourth Proportional to 91,759.80, 137,726.10 and 56,767.80

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Solution

The fourth proportional to 91,759.80, 137,726.10 and 56,767.80 is: 85,205.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,759.80 : 137,726.10 = 56,767.80 : x
  2. Step 2: Convert to fraction form
    91,759.80/137,726.10 = 56,767.80/x
  3. Step 3: Cross multiply
    91,759.80x = 137,726.10 × 56,767.80
  4. Step 4: Simplify right side
    91,759.80x = 7,818,407,699.58
  5. Step 5: Solve for x
    x = 7,818,407,699.58/91,759.80
  6. Step 6: Final answer
    x = 85,205.15

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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.