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Finding the Fourth Proportional to 70,720.75, 97,597.28 and 42,420.97

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Solution

The fourth proportional to 70,720.75, 97,597.28 and 42,420.97 is: 58,542.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,720.75 : 97,597.28 = 42,420.97 : x
  2. Step 2: Convert to fraction form
    70,720.75/97,597.28 = 42,420.97/x
  3. Step 3: Cross multiply
    70,720.75x = 97,597.28 × 42,420.97
  4. Step 4: Simplify right side
    70,720.75x = 4,140,170,586.87
  5. Step 5: Solve for x
    x = 4,140,170,586.87/70,720.75
  6. Step 6: Final answer
    x = 58,542.52

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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.