Home / 89,905.20-123,999.08-57,642.90

Finding the Fourth Proportional to 89,905.20, 123,999.08 and 57,642.90

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Solution

The fourth proportional to 89,905.20, 123,999.08 and 57,642.90 is: 79,502.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,905.20 : 123,999.08 = 57,642.90 : x
  2. Step 2: Convert to fraction form
    89,905.20/123,999.08 = 57,642.90/x
  3. Step 3: Cross multiply
    89,905.20x = 123,999.08 × 57,642.90
  4. Step 4: Simplify right side
    89,905.20x = 7,147,666,568.53
  5. Step 5: Solve for x
    x = 7,147,666,568.53/89,905.20
  6. Step 6: Final answer
    x = 79,502.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.