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Finding the Fourth Proportional to 83,911.20, 125,575.20 and 57,667.20

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Solution

The fourth proportional to 83,911.20, 125,575.20 and 57,667.20 is: 86,300.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,911.20 : 125,575.20 = 57,667.20 : x
  2. Step 2: Convert to fraction form
    83,911.20/125,575.20 = 57,667.20/x
  3. Step 3: Cross multiply
    83,911.20x = 125,575.20 × 57,667.20
  4. Step 4: Simplify right side
    83,911.20x = 7,241,570,173.44
  5. Step 5: Solve for x
    x = 7,241,570,173.44/83,911.20
  6. Step 6: Final answer
    x = 86,300.40

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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.