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Finding the Fourth Proportional to 70,788.16, 97,687.60 and 38,957.06

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Solution

The fourth proportional to 70,788.16, 97,687.60 and 38,957.06 is: 53,760.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,788.16 : 97,687.60 = 38,957.06 : x
  2. Step 2: Convert to fraction form
    70,788.16/97,687.60 = 38,957.06/x
  3. Step 3: Cross multiply
    70,788.16x = 97,687.60 × 38,957.06
  4. Step 4: Simplify right side
    70,788.16x = 3,805,621,694.46
  5. Step 5: Solve for x
    x = 3,805,621,694.46/70,788.16
  6. Step 6: Final answer
    x = 53,760.71

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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.