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Finding the Fourth Proportional to 125,271.65, 172,867.44 and 74,289.20

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Solution

The fourth proportional to 125,271.65, 172,867.44 and 74,289.20 is: 102,514.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,271.65 : 172,867.44 = 74,289.20 : x
  2. Step 2: Convert to fraction form
    125,271.65/172,867.44 = 74,289.20/x
  3. Step 3: Cross multiply
    125,271.65x = 172,867.44 × 74,289.20
  4. Step 4: Simplify right side
    125,271.65x = 12,842,182,959.31
  5. Step 5: Solve for x
    x = 12,842,182,959.31/125,271.65
  6. Step 6: Final answer
    x = 102,514.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.