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Finding the Fourth Proportional to 82,960.90, 124,441.80 and 20,631.40

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Solution

The fourth proportional to 82,960.90, 124,441.80 and 20,631.40 is: 30,947.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,960.90 : 124,441.80 = 20,631.40 : x
  2. Step 2: Convert to fraction form
    82,960.90/124,441.80 = 20,631.40/x
  3. Step 3: Cross multiply
    82,960.90x = 124,441.80 × 20,631.40
  4. Step 4: Simplify right side
    82,960.90x = 2,567,408,552.52
  5. Step 5: Solve for x
    x = 2,567,408,552.52/82,960.90
  6. Step 6: Final answer
    x = 30,947.21

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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.