Home / 91,722.08-137,538.67-53,781.72

Finding the Fourth Proportional to 91,722.08, 137,538.67 and 53,781.72

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Solution

The fourth proportional to 91,722.08, 137,538.67 and 53,781.72 is: 80,646.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,722.08 : 137,538.67 = 53,781.72 : x
  2. Step 2: Convert to fraction form
    91,722.08/137,538.67 = 53,781.72/x
  3. Step 3: Cross multiply
    91,722.08x = 137,538.67 × 53,781.72
  4. Step 4: Simplify right side
    91,722.08x = 7,397,066,239.11
  5. Step 5: Solve for x
    x = 7,397,066,239.11/91,722.08
  6. Step 6: Final answer
    x = 80,646.52

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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.