Home / 123,389.12-170,288.47-74,979.87

Finding the Fourth Proportional to 123,389.12, 170,288.47 and 74,979.87

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Solution

The fourth proportional to 123,389.12, 170,288.47 and 74,979.87 is: 103,479.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,389.12 : 170,288.47 = 74,979.87 : x
  2. Step 2: Convert to fraction form
    123,389.12/170,288.47 = 74,979.87/x
  3. Step 3: Cross multiply
    123,389.12x = 170,288.47 × 74,979.87
  4. Step 4: Simplify right side
    123,389.12x = 12,768,207,343.10
  5. Step 5: Solve for x
    x = 12,768,207,343.10/123,389.12
  6. Step 6: Final answer
    x = 103,479.20

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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.