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Finding the Fourth Proportional to 82,781.40, 124,176.90 and 23,621.40

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Solution

The fourth proportional to 82,781.40, 124,176.90 and 23,621.40 is: 35,433.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,781.40 : 124,176.90 = 23,621.40 : x
  2. Step 2: Convert to fraction form
    82,781.40/124,176.90 = 23,621.40/x
  3. Step 3: Cross multiply
    82,781.40x = 124,176.90 × 23,621.40
  4. Step 4: Simplify right side
    82,781.40x = 2,933,232,225.66
  5. Step 5: Solve for x
    x = 2,933,232,225.66/82,781.40
  6. Step 6: Final answer
    x = 35,433.47

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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.