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Finding the Fourth Proportional to 86,578.80, 129,841.20 and 34,004.40

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Solution

The fourth proportional to 86,578.80, 129,841.20 and 34,004.40 is: 50,996.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,578.80 : 129,841.20 = 34,004.40 : x
  2. Step 2: Convert to fraction form
    86,578.80/129,841.20 = 34,004.40/x
  3. Step 3: Cross multiply
    86,578.80x = 129,841.20 × 34,004.40
  4. Step 4: Simplify right side
    86,578.80x = 4,415,172,101.28
  5. Step 5: Solve for x
    x = 4,415,172,101.28/86,578.80
  6. Step 6: Final answer
    x = 50,996.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.