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Finding the Fourth Proportional to 213,515.60, 320,050.80 and 80,304.08

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Solution

The fourth proportional to 213,515.60, 320,050.80 and 80,304.08 is: 120,372.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,515.60 : 320,050.80 = 80,304.08 : x
  2. Step 2: Convert to fraction form
    213,515.60/320,050.80 = 80,304.08/x
  3. Step 3: Cross multiply
    213,515.60x = 320,050.80 × 80,304.08
  4. Step 4: Simplify right side
    213,515.60x = 25,701,385,047.26
  5. Step 5: Solve for x
    x = 25,701,385,047.26/213,515.60
  6. Step 6: Final answer
    x = 120,372.40

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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.