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Finding the Fourth Proportional to 91,390.80, 126,119.64 and 53,159.52

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Solution

The fourth proportional to 91,390.80, 126,119.64 and 53,159.52 is: 73,360.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,390.80 : 126,119.64 = 53,159.52 : x
  2. Step 2: Convert to fraction form
    91,390.80/126,119.64 = 53,159.52/x
  3. Step 3: Cross multiply
    91,390.80x = 126,119.64 × 53,159.52
  4. Step 4: Simplify right side
    91,390.80x = 6,704,459,524.97
  5. Step 5: Solve for x
    x = 6,704,459,524.97/91,390.80
  6. Step 6: Final answer
    x = 73,360.33

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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.