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Finding the Fourth Proportional to 70,279.80, 96,988.42 and 40,064.56

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Solution

The fourth proportional to 70,279.80, 96,988.42 and 40,064.56 is: 55,290.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,279.80 : 96,988.42 = 40,064.56 : x
  2. Step 2: Convert to fraction form
    70,279.80/96,988.42 = 40,064.56/x
  3. Step 3: Cross multiply
    70,279.80x = 96,988.42 × 40,064.56
  4. Step 4: Simplify right side
    70,279.80x = 3,885,798,372.40
  5. Step 5: Solve for x
    x = 3,885,798,372.40/70,279.80
  6. Step 6: Final answer
    x = 55,290.40

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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.