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Finding the Fourth Proportional to 91,294.62, 126,538.76 and 86,038.59

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Solution

The fourth proportional to 91,294.62, 126,538.76 and 86,038.59 is: 119,253.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,294.62 : 126,538.76 = 86,038.59 : x
  2. Step 2: Convert to fraction form
    91,294.62/126,538.76 = 86,038.59/x
  3. Step 3: Cross multiply
    91,294.62x = 126,538.76 × 86,038.59
  4. Step 4: Simplify right side
    91,294.62x = 10,887,216,060.56
  5. Step 5: Solve for x
    x = 10,887,216,060.56/91,294.62
  6. Step 6: Final answer
    x = 119,253.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.