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Finding the Fourth Proportional to 91,689.37, 126,572.78 and 57,747.74

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Solution

The fourth proportional to 91,689.37, 126,572.78 and 57,747.74 is: 79,717.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,689.37 : 126,572.78 = 57,747.74 : x
  2. Step 2: Convert to fraction form
    91,689.37/126,572.78 = 57,747.74/x
  3. Step 3: Cross multiply
    91,689.37x = 126,572.78 × 57,747.74
  4. Step 4: Simplify right side
    91,689.37x = 7,309,291,990.52
  5. Step 5: Solve for x
    x = 7,309,291,990.52/91,689.37
  6. Step 6: Final answer
    x = 79,717.99

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1.5x scale

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.