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Finding the Fourth Proportional to 91,390.94, 126,118.78 and 51,104.78

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Solution

The fourth proportional to 91,390.94, 126,118.78 and 51,104.78 is: 70,524.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,390.94 : 126,118.78 = 51,104.78 : x
  2. Step 2: Convert to fraction form
    91,390.94/126,118.78 = 51,104.78/x
  3. Step 3: Cross multiply
    91,390.94x = 126,118.78 × 51,104.78
  4. Step 4: Simplify right side
    91,390.94x = 6,445,272,505.77
  5. Step 5: Solve for x
    x = 6,445,272,505.77/91,390.94
  6. Step 6: Final answer
    x = 70,524.20

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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.