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Finding the Fourth Proportional to 70,805.97, 97,712.15 and 38,976.91

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Solution

The fourth proportional to 70,805.97, 97,712.15 and 38,976.91 is: 53,788.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,805.97 : 97,712.15 = 38,976.91 : x
  2. Step 2: Convert to fraction form
    70,805.97/97,712.15 = 38,976.91/x
  3. Step 3: Cross multiply
    70,805.97x = 97,712.15 × 38,976.91
  4. Step 4: Simplify right side
    70,805.97x = 3,808,517,237.29
  5. Step 5: Solve for x
    x = 3,808,517,237.29/70,805.97
  6. Step 6: Final answer
    x = 53,788.08

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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.