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Finding the Fourth Proportional to 91,290.87, 125,979.06 and 51,004.92

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Solution

The fourth proportional to 91,290.87, 125,979.06 and 51,004.92 is: 70,385.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,290.87 : 125,979.06 = 51,004.92 : x
  2. Step 2: Convert to fraction form
    91,290.87/125,979.06 = 51,004.92/x
  3. Step 3: Cross multiply
    91,290.87x = 125,979.06 × 51,004.92
  4. Step 4: Simplify right side
    91,290.87x = 6,425,551,876.98
  5. Step 5: Solve for x
    x = 6,425,551,876.98/91,290.87
  6. Step 6: Final answer
    x = 70,385.48

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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.