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Finding the Fourth Proportional to 324,695.20, 487,119.60 and 103,079.20

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Solution

The fourth proportional to 324,695.20, 487,119.60 and 103,079.20 is: 154,643.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,695.20 : 487,119.60 = 103,079.20 : x
  2. Step 2: Convert to fraction form
    324,695.20/487,119.60 = 103,079.20/x
  3. Step 3: Cross multiply
    324,695.20x = 487,119.60 × 103,079.20
  4. Step 4: Simplify right side
    324,695.20x = 50,211,898,672.32
  5. Step 5: Solve for x
    x = 50,211,898,672.32/324,695.20
  6. Step 6: Final answer
    x = 154,643.18

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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.