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Finding the Fourth Proportional to 83,649.66, 115,433.94 and 45,407.40

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Solution

The fourth proportional to 83,649.66, 115,433.94 and 45,407.40 is: 62,660.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,649.66 : 115,433.94 = 45,407.40 : x
  2. Step 2: Convert to fraction form
    83,649.66/115,433.94 = 45,407.40/x
  3. Step 3: Cross multiply
    83,649.66x = 115,433.94 × 45,407.40
  4. Step 4: Simplify right side
    83,649.66x = 5,241,555,087.16
  5. Step 5: Solve for x
    x = 5,241,555,087.16/83,649.66
  6. Step 6: Final answer
    x = 62,660.81

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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.