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Finding the Fourth Proportional to 90,038.82, 124,251.86 and 49,751.72

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Solution

The fourth proportional to 90,038.82, 124,251.86 and 49,751.72 is: 68,656.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,038.82 : 124,251.86 = 49,751.72 : x
  2. Step 2: Convert to fraction form
    90,038.82/124,251.86 = 49,751.72/x
  3. Step 3: Cross multiply
    90,038.82x = 124,251.86 × 49,751.72
  4. Step 4: Simplify right side
    90,038.82x = 6,181,743,748.20
  5. Step 5: Solve for x
    x = 6,181,743,748.20/90,038.82
  6. Step 6: Final answer
    x = 68,656.43

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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.