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Finding the Fourth Proportional to 79,987.60, 110,381.97 and 43,688.87

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Solution

The fourth proportional to 79,987.60, 110,381.97 and 43,688.87 is: 60,290.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,987.60 : 110,381.97 = 43,688.87 : x
  2. Step 2: Convert to fraction form
    79,987.60/110,381.97 = 43,688.87/x
  3. Step 3: Cross multiply
    79,987.60x = 110,381.97 × 43,688.87
  4. Step 4: Simplify right side
    79,987.60x = 4,822,463,537.67
  5. Step 5: Solve for x
    x = 4,822,463,537.67/79,987.60
  6. Step 6: Final answer
    x = 60,290.14

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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.