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Finding the Fourth Proportional to 70,790.71, 97,690.16 and 38,959.61

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Solution

The fourth proportional to 70,790.71, 97,690.16 and 38,959.61 is: 53,763.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,790.71 : 97,690.16 = 38,959.61 : x
  2. Step 2: Convert to fraction form
    70,790.71/97,690.16 = 38,959.61/x
  3. Step 3: Cross multiply
    70,790.71x = 97,690.16 × 38,959.61
  4. Step 4: Simplify right side
    70,790.71x = 3,805,970,045.99
  5. Step 5: Solve for x
    x = 3,805,970,045.99/70,790.71
  6. Step 6: Final answer
    x = 53,763.70

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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.