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Finding the Fourth Proportional to 82,955.90, 124,434.30 and 20,626.40

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Solution

The fourth proportional to 82,955.90, 124,434.30 and 20,626.40 is: 30,939.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,955.90 : 124,434.30 = 20,626.40 : x
  2. Step 2: Convert to fraction form
    82,955.90/124,434.30 = 20,626.40/x
  3. Step 3: Cross multiply
    82,955.90x = 124,434.30 × 20,626.40
  4. Step 4: Simplify right side
    82,955.90x = 2,566,631,645.52
  5. Step 5: Solve for x
    x = 2,566,631,645.52/82,955.90
  6. Step 6: Final answer
    x = 30,939.71

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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.