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Finding the Fourth Proportional to 90,686.49, 125,222.89 and 75,657.94

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Solution

The fourth proportional to 90,686.49, 125,222.89 and 75,657.94 is: 104,470.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,686.49 : 125,222.89 = 75,657.94 : x
  2. Step 2: Convert to fraction form
    90,686.49/125,222.89 = 75,657.94/x
  3. Step 3: Cross multiply
    90,686.49x = 125,222.89 × 75,657.94
  4. Step 4: Simplify right side
    90,686.49x = 9,474,105,898.25
  5. Step 5: Solve for x
    x = 9,474,105,898.25/90,686.49
  6. Step 6: Final answer
    x = 104,470.97

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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.