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Finding the Fourth Proportional to 70,812.32, 97,721.01 and 38,980.98

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Solution

The fourth proportional to 70,812.32, 97,721.01 and 38,980.98 is: 53,793.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,812.32 : 97,721.01 = 38,980.98 : x
  2. Step 2: Convert to fraction form
    70,812.32/97,721.01 = 38,980.98/x
  3. Step 3: Cross multiply
    70,812.32x = 97,721.01 × 38,980.98
  4. Step 4: Simplify right side
    70,812.32x = 3,809,260,736.39
  5. Step 5: Solve for x
    x = 3,809,260,736.39/70,812.32
  6. Step 6: Final answer
    x = 53,793.76

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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.