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Finding the Fourth Proportional to 91,925.31, 126,850.10 and 51,645.78

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Solution

The fourth proportional to 91,925.31, 126,850.10 and 51,645.78 is: 71,267.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,925.31 : 126,850.10 = 51,645.78 : x
  2. Step 2: Convert to fraction form
    91,925.31/126,850.10 = 51,645.78/x
  3. Step 3: Cross multiply
    91,925.31x = 126,850.10 × 51,645.78
  4. Step 4: Simplify right side
    91,925.31x = 6,551,272,033.09
  5. Step 5: Solve for x
    x = 6,551,272,033.09/91,925.31
  6. Step 6: Final answer
    x = 71,267.34

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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.