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Finding the Fourth Proportional to 82,761.61, 123,903.04 and 74,215.30

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Solution

The fourth proportional to 82,761.61, 123,903.04 and 74,215.30 is: 111,108.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,761.61 : 123,903.04 = 74,215.30 : x
  2. Step 2: Convert to fraction form
    82,761.61/123,903.04 = 74,215.30/x
  3. Step 3: Cross multiply
    82,761.61x = 123,903.04 × 74,215.30
  4. Step 4: Simplify right side
    82,761.61x = 9,195,501,284.51
  5. Step 5: Solve for x
    x = 9,195,501,284.51/82,761.61
  6. Step 6: Final answer
    x = 111,108.29

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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.