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Finding the Fourth Proportional to 330,131.60, 495,139.80 and 119,661.20

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Solution

The fourth proportional to 330,131.60, 495,139.80 and 119,661.20 is: 179,470.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,131.60 : 495,139.80 = 119,661.20 : x
  2. Step 2: Convert to fraction form
    330,131.60/495,139.80 = 119,661.20/x
  3. Step 3: Cross multiply
    330,131.60x = 495,139.80 × 119,661.20
  4. Step 4: Simplify right side
    330,131.60x = 59,249,022,635.76
  5. Step 5: Solve for x
    x = 59,249,022,635.76/330,131.60
  6. Step 6: Final answer
    x = 179,470.92

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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.