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Finding the Fourth Proportional to 272,078.20, 408,117.30 and 105,866.20

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Solution

The fourth proportional to 272,078.20, 408,117.30 and 105,866.20 is: 158,799.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,078.20 : 408,117.30 = 105,866.20 : x
  2. Step 2: Convert to fraction form
    272,078.20/408,117.30 = 105,866.20/x
  3. Step 3: Cross multiply
    272,078.20x = 408,117.30 × 105,866.20
  4. Step 4: Simplify right side
    272,078.20x = 43,205,827,705.26
  5. Step 5: Solve for x
    x = 43,205,827,705.26/272,078.20
  6. Step 6: Final answer
    x = 158,799.30

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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.