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Finding the Fourth Proportional to 70,689.91, 97,552.18 and 38,859

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Solution

The fourth proportional to 70,689.91, 97,552.18 and 38,859 is: 53,625.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,689.91 : 97,552.18 = 38,859 : x
  2. Step 2: Convert to fraction form
    70,689.91/97,552.18 = 38,859/x
  3. Step 3: Cross multiply
    70,689.91x = 97,552.18 × 38,859
  4. Step 4: Simplify right side
    70,689.91x = 3,790,780,162.62
  5. Step 5: Solve for x
    x = 3,790,780,162.62/70,689.91
  6. Step 6: Final answer
    x = 53,625.48

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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.