Home / 123,357.64-170,235-72,371.26

Finding the Fourth Proportional to 123,357.64, 170,235 and 72,371.26

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Solution

The fourth proportional to 123,357.64, 170,235 and 72,371.26 is: 99,873.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,357.64 : 170,235 = 72,371.26 : x
  2. Step 2: Convert to fraction form
    123,357.64/170,235 = 72,371.26/x
  3. Step 3: Cross multiply
    123,357.64x = 170,235 × 72,371.26
  4. Step 4: Simplify right side
    123,357.64x = 12,320,121,446.10
  5. Step 5: Solve for x
    x = 12,320,121,446.10/123,357.64
  6. Step 6: Final answer
    x = 99,873.19

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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.