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Finding the Fourth Proportional to 70,510.81, 97,304.92 and 38,679.79

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Solution

The fourth proportional to 70,510.81, 97,304.92 and 38,679.79 is: 53,378.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,510.81 : 97,304.92 = 38,679.79 : x
  2. Step 2: Convert to fraction form
    70,510.81/97,304.92 = 38,679.79/x
  3. Step 3: Cross multiply
    70,510.81x = 97,304.92 × 38,679.79
  4. Step 4: Simplify right side
    70,510.81x = 3,763,733,871.57
  5. Step 5: Solve for x
    x = 3,763,733,871.57/70,510.81
  6. Step 6: Final answer
    x = 53,378.11

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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.