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Finding the Fourth Proportional to 70,788.80, 97,686.57 and 40,167.47

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Solution

The fourth proportional to 70,788.80, 97,686.57 and 40,167.47 is: 55,429.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,788.80 : 97,686.57 = 40,167.47 : x
  2. Step 2: Convert to fraction form
    70,788.80/97,686.57 = 40,167.47/x
  3. Step 3: Cross multiply
    70,788.80x = 97,686.57 × 40,167.47
  4. Step 4: Simplify right side
    70,788.80x = 3,923,821,881.45
  5. Step 5: Solve for x
    x = 3,923,821,881.45/70,788.80
  6. Step 6: Final answer
    x = 55,429.99

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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.