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Finding the Fourth Proportional to 45,319.10, 67,978.65 and 40,726.40

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Solution

The fourth proportional to 45,319.10, 67,978.65 and 40,726.40 is: 61,089.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,319.10 : 67,978.65 = 40,726.40 : x
  2. Step 2: Convert to fraction form
    45,319.10/67,978.65 = 40,726.40/x
  3. Step 3: Cross multiply
    45,319.10x = 67,978.65 × 40,726.40
  4. Step 4: Simplify right side
    45,319.10x = 2,768,525,691.36
  5. Step 5: Solve for x
    x = 2,768,525,691.36/45,319.10
  6. Step 6: Final answer
    x = 61,089.60

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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.