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Finding the Fourth Proportional to 90,120.90, 124,365.54 and 49,833.78

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Solution

The fourth proportional to 90,120.90, 124,365.54 and 49,833.78 is: 68,769.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,120.90 : 124,365.54 = 49,833.78 : x
  2. Step 2: Convert to fraction form
    90,120.90/124,365.54 = 49,833.78/x
  3. Step 3: Cross multiply
    90,120.90x = 124,365.54 × 49,833.78
  4. Step 4: Simplify right side
    90,120.90x = 6,197,604,959.94
  5. Step 5: Solve for x
    x = 6,197,604,959.94/90,120.90
  6. Step 6: Final answer
    x = 68,769.90

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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.