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Finding the Fourth Proportional to 45,710.80, 68,681.40 and 29,078.80

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Solution

The fourth proportional to 45,710.80, 68,681.40 and 29,078.80 is: 43,691.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,710.80 : 68,681.40 = 29,078.80 : x
  2. Step 2: Convert to fraction form
    45,710.80/68,681.40 = 29,078.80/x
  3. Step 3: Cross multiply
    45,710.80x = 68,681.40 × 29,078.80
  4. Step 4: Simplify right side
    45,710.80x = 1,997,172,694.32
  5. Step 5: Solve for x
    x = 1,997,172,694.32/45,710.80
  6. Step 6: Final answer
    x = 43,691.48

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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.