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Finding the Fourth Proportional to 70,390, 97,138.20 and 38,559.03

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Solution

The fourth proportional to 70,390, 97,138.20 and 38,559.03 is: 53,211.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,390 : 97,138.20 = 38,559.03 : x
  2. Step 2: Convert to fraction form
    70,390/97,138.20 = 38,559.03/x
  3. Step 3: Cross multiply
    70,390x = 97,138.20 × 38,559.03
  4. Step 4: Simplify right side
    70,390x = 3,745,554,767.95
  5. Step 5: Solve for x
    x = 3,745,554,767.95/70,390
  6. Step 6: Final answer
    x = 53,211.46

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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.