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Finding the Fourth Proportional to 90,209.70, 124,490.93 and 49,377.40

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Solution

The fourth proportional to 90,209.70, 124,490.93 and 49,377.40 is: 68,141.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,209.70 : 124,490.93 = 49,377.40 : x
  2. Step 2: Convert to fraction form
    90,209.70/124,490.93 = 49,377.40/x
  3. Step 3: Cross multiply
    90,209.70x = 124,490.93 × 49,377.40
  4. Step 4: Simplify right side
    90,209.70x = 6,147,037,888.87
  5. Step 5: Solve for x
    x = 6,147,037,888.87/90,209.70
  6. Step 6: Final answer
    x = 68,141.65

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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.