Home / 91,829.20-137,824.80-54,342.40

Finding the Fourth Proportional to 91,829.20, 137,824.80 and 54,342.40

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Solution

The fourth proportional to 91,829.20, 137,824.80 and 54,342.40 is: 81,561.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,829.20 : 137,824.80 = 54,342.40 : x
  2. Step 2: Convert to fraction form
    91,829.20/137,824.80 = 54,342.40/x
  3. Step 3: Cross multiply
    91,829.20x = 137,824.80 × 54,342.40
  4. Step 4: Simplify right side
    91,829.20x = 7,489,730,411.52
  5. Step 5: Solve for x
    x = 7,489,730,411.52/91,829.20
  6. Step 6: Final answer
    x = 81,561.53

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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.