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Finding the Fourth Proportional to 45,520.80, 68,281.20 and 14,359.20

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Solution

The fourth proportional to 45,520.80, 68,281.20 and 14,359.20 is: 21,538.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,520.80 : 68,281.20 = 14,359.20 : x
  2. Step 2: Convert to fraction form
    45,520.80/68,281.20 = 14,359.20/x
  3. Step 3: Cross multiply
    45,520.80x = 68,281.20 × 14,359.20
  4. Step 4: Simplify right side
    45,520.80x = 980,463,407.04
  5. Step 5: Solve for x
    x = 980,463,407.04/45,520.80
  6. Step 6: Final answer
    x = 21,538.80

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1.5x scale

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.