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Finding the Fourth Proportional to 90,101.56, 124,329.30 and 49,809.88

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Solution

The fourth proportional to 90,101.56, 124,329.30 and 49,809.88 is: 68,731.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,101.56 : 124,329.30 = 49,809.88 : x
  2. Step 2: Convert to fraction form
    90,101.56/124,329.30 = 49,809.88/x
  3. Step 3: Cross multiply
    90,101.56x = 124,329.30 × 49,809.88
  4. Step 4: Simplify right side
    90,101.56x = 6,192,827,513.48
  5. Step 5: Solve for x
    x = 6,192,827,513.48/90,101.56
  6. Step 6: Final answer
    x = 68,731.63

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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.