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Finding the Fourth Proportional to 109,218.41, 150,721.07 and 61,471.74

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Solution

The fourth proportional to 109,218.41, 150,721.07 and 61,471.74 is: 84,830.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,218.41 : 150,721.07 = 61,471.74 : x
  2. Step 2: Convert to fraction form
    109,218.41/150,721.07 = 61,471.74/x
  3. Step 3: Cross multiply
    109,218.41x = 150,721.07 × 61,471.74
  4. Step 4: Simplify right side
    109,218.41x = 9,265,086,120.20
  5. Step 5: Solve for x
    x = 9,265,086,120.20/109,218.41
  6. Step 6: Final answer
    x = 84,830.81

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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.