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Finding the Fourth Proportional to 140,479.88, 210,751.58 and 40,648.10

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Solution

The fourth proportional to 140,479.88, 210,751.58 and 40,648.10 is: 60,981.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,479.88 : 210,751.58 = 40,648.10 : x
  2. Step 2: Convert to fraction form
    140,479.88/210,751.58 = 40,648.10/x
  3. Step 3: Cross multiply
    140,479.88x = 210,751.58 × 40,648.10
  4. Step 4: Simplify right side
    140,479.88x = 8,566,650,346.86
  5. Step 5: Solve for x
    x = 8,566,650,346.86/140,479.88
  6. Step 6: Final answer
    x = 60,981.34

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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.