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Finding the Fourth Proportional to 45,782.80, 68,674.20 and 19,488.40

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Solution

The fourth proportional to 45,782.80, 68,674.20 and 19,488.40 is: 29,232.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,782.80 : 68,674.20 = 19,488.40 : x
  2. Step 2: Convert to fraction form
    45,782.80/68,674.20 = 19,488.40/x
  3. Step 3: Cross multiply
    45,782.80x = 68,674.20 × 19,488.40
  4. Step 4: Simplify right side
    45,782.80x = 1,338,350,279.28
  5. Step 5: Solve for x
    x = 1,338,350,279.28/45,782.80
  6. Step 6: Final answer
    x = 29,232.60

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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.