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Finding the Fourth Proportional to 91,713.80, 137,570.70 and 36,309.80

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Solution

The fourth proportional to 91,713.80, 137,570.70 and 36,309.80 is: 54,464.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,713.80 : 137,570.70 = 36,309.80 : x
  2. Step 2: Convert to fraction form
    91,713.80/137,570.70 = 36,309.80/x
  3. Step 3: Cross multiply
    91,713.80x = 137,570.70 × 36,309.80
  4. Step 4: Simplify right side
    91,713.80x = 4,995,164,602.86
  5. Step 5: Solve for x
    x = 4,995,164,602.86/91,713.80
  6. Step 6: Final answer
    x = 54,464.70

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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.