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Finding the Fourth Proportional to 82,540.10, 123,810.15 and 20,210.60

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Solution

The fourth proportional to 82,540.10, 123,810.15 and 20,210.60 is: 30,315.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,540.10 : 123,810.15 = 20,210.60 : x
  2. Step 2: Convert to fraction form
    82,540.10/123,810.15 = 20,210.60/x
  3. Step 3: Cross multiply
    82,540.10x = 123,810.15 × 20,210.60
  4. Step 4: Simplify right side
    82,540.10x = 2,502,277,417.59
  5. Step 5: Solve for x
    x = 2,502,277,417.59/82,540.10
  6. Step 6: Final answer
    x = 30,315.90

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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.