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Finding the Fourth Proportional to 81,886.40, 122,959.20 and 62,187.20

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Solution

The fourth proportional to 81,886.40, 122,959.20 and 62,187.20 is: 93,379.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,886.40 : 122,959.20 = 62,187.20 : x
  2. Step 2: Convert to fraction form
    81,886.40/122,959.20 = 62,187.20/x
  3. Step 3: Cross multiply
    81,886.40x = 122,959.20 × 62,187.20
  4. Step 4: Simplify right side
    81,886.40x = 7,646,488,362.24
  5. Step 5: Solve for x
    x = 7,646,488,362.24/81,886.40
  6. Step 6: Final answer
    x = 93,379.22

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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.