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Finding the Fourth Proportional to 70,690.56, 97,512.30 and 42,379.80

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Solution

The fourth proportional to 70,690.56, 97,512.30 and 42,379.80 is: 58,459.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,690.56 : 97,512.30 = 42,379.80 : x
  2. Step 2: Convert to fraction form
    70,690.56/97,512.30 = 42,379.80/x
  3. Step 3: Cross multiply
    70,690.56x = 97,512.30 × 42,379.80
  4. Step 4: Simplify right side
    70,690.56x = 4,132,551,771.54
  5. Step 5: Solve for x
    x = 4,132,551,771.54/70,690.56
  6. Step 6: Final answer
    x = 58,459.74

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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.