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Finding the Fourth Proportional to 60,815.80, 91,029.30 and 43,319.80

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Solution

The fourth proportional to 60,815.80, 91,029.30 and 43,319.80 is: 64,841.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,815.80 : 91,029.30 = 43,319.80 : x
  2. Step 2: Convert to fraction form
    60,815.80/91,029.30 = 43,319.80/x
  3. Step 3: Cross multiply
    60,815.80x = 91,029.30 × 43,319.80
  4. Step 4: Simplify right side
    60,815.80x = 3,943,371,070.14
  5. Step 5: Solve for x
    x = 3,943,371,070.14/60,815.80
  6. Step 6: Final answer
    x = 64,841.23

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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.