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Finding the Fourth Proportional to 90,113.92, 124,326.40 and 54,290.40

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Solution

The fourth proportional to 90,113.92, 124,326.40 and 54,290.40 is: 74,902.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,113.92 : 124,326.40 = 54,290.40 : x
  2. Step 2: Convert to fraction form
    90,113.92/124,326.40 = 54,290.40/x
  3. Step 3: Cross multiply
    90,113.92x = 124,326.40 × 54,290.40
  4. Step 4: Simplify right side
    90,113.92x = 6,749,729,986.56
  5. Step 5: Solve for x
    x = 6,749,729,986.56/90,113.92
  6. Step 6: Final answer
    x = 74,902.19

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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.