Home / 71,672.40-98,931-43,401.78

Finding the Fourth Proportional to 71,672.40, 98,931 and 43,401.78

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Solution

The fourth proportional to 71,672.40, 98,931 and 43,401.78 is: 59,908.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,672.40 : 98,931 = 43,401.78 : x
  2. Step 2: Convert to fraction form
    71,672.40/98,931 = 43,401.78/x
  3. Step 3: Cross multiply
    71,672.40x = 98,931 × 43,401.78
  4. Step 4: Simplify right side
    71,672.40x = 4,293,781,497.18
  5. Step 5: Solve for x
    x = 4,293,781,497.18/71,672.40
  6. Step 6: Final answer
    x = 59,908.44

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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.