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Finding the Fourth Proportional to 91,299.95, 126,080.19 and 86,329.98

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Solution

The fourth proportional to 91,299.95, 126,080.19 and 86,329.98 is: 119,216.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,299.95 : 126,080.19 = 86,329.98 : x
  2. Step 2: Convert to fraction form
    91,299.95/126,080.19 = 86,329.98/x
  3. Step 3: Cross multiply
    91,299.95x = 126,080.19 × 86,329.98
  4. Step 4: Simplify right side
    91,299.95x = 10,884,500,281.10
  5. Step 5: Solve for x
    x = 10,884,500,281.10/91,299.95
  6. Step 6: Final answer
    x = 119,216.94

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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.