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Finding the Fourth Proportional to 70,720.79, 97,566.84 and 40,489.83

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Solution

The fourth proportional to 70,720.79, 97,566.84 and 40,489.83 is: 55,860.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,720.79 : 97,566.84 = 40,489.83 : x
  2. Step 2: Convert to fraction form
    70,720.79/97,566.84 = 40,489.83/x
  3. Step 3: Cross multiply
    70,720.79x = 97,566.84 × 40,489.83
  4. Step 4: Simplify right side
    70,720.79x = 3,950,464,765.24
  5. Step 5: Solve for x
    x = 3,950,464,765.24/70,720.79
  6. Step 6: Final answer
    x = 55,860.02

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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.