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Finding the Fourth Proportional to 70,803.78, 97,708.86 and 38,972.04

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Solution

The fourth proportional to 70,803.78, 97,708.86 and 38,972.04 is: 53,781.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,803.78 : 97,708.86 = 38,972.04 : x
  2. Step 2: Convert to fraction form
    70,803.78/97,708.86 = 38,972.04/x
  3. Step 3: Cross multiply
    70,803.78x = 97,708.86 × 38,972.04
  4. Step 4: Simplify right side
    70,803.78x = 3,807,913,600.27
  5. Step 5: Solve for x
    x = 3,807,913,600.27/70,803.78
  6. Step 6: Final answer
    x = 53,781.22

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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.