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Finding the Fourth Proportional to 91,615.79, 126,454.91 and 55,805.49

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Solution

The fourth proportional to 91,615.79, 126,454.91 and 55,805.49 is: 77,026.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,615.79 : 126,454.91 = 55,805.49 : x
  2. Step 2: Convert to fraction form
    91,615.79/126,454.91 = 55,805.49/x
  3. Step 3: Cross multiply
    91,615.79x = 126,454.91 × 55,805.49
  4. Step 4: Simplify right side
    91,615.79x = 7,056,877,936.43
  5. Step 5: Solve for x
    x = 7,056,877,936.43/91,615.79
  6. Step 6: Final answer
    x = 77,026.87

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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.