Home / 91,387.81-126,129.45-55,589.05

Finding the Fourth Proportional to 91,387.81, 126,129.45 and 55,589.05

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Solution

The fourth proportional to 91,387.81, 126,129.45 and 55,589.05 is: 76,721.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,387.81 : 126,129.45 = 55,589.05 : x
  2. Step 2: Convert to fraction form
    91,387.81/126,129.45 = 55,589.05/x
  3. Step 3: Cross multiply
    91,387.81x = 126,129.45 × 55,589.05
  4. Step 4: Simplify right side
    91,387.81x = 7,011,416,302.52
  5. Step 5: Solve for x
    x = 7,011,416,302.52/91,387.81
  6. Step 6: Final answer
    x = 76,721.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.