Home / 189,443.91-261,428.60-103,400.04

Finding the Fourth Proportional to 189,443.91, 261,428.60 and 103,400.04

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Solution

The fourth proportional to 189,443.91, 261,428.60 and 103,400.04 is: 142,689.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,443.91 : 261,428.60 = 103,400.04 : x
  2. Step 2: Convert to fraction form
    189,443.91/261,428.60 = 103,400.04/x
  3. Step 3: Cross multiply
    189,443.91x = 261,428.60 × 103,400.04
  4. Step 4: Simplify right side
    189,443.91x = 27,031,727,697.14
  5. Step 5: Solve for x
    x = 27,031,727,697.14/189,443.91
  6. Step 6: Final answer
    x = 142,689.87

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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.