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Finding the Fourth Proportional to 189,402.99, 261,377.65 and 103,362.65

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Solution

The fourth proportional to 189,402.99, 261,377.65 and 103,362.65 is: 142,641.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,402.99 : 261,377.65 = 103,362.65 : x
  2. Step 2: Convert to fraction form
    189,402.99/261,377.65 = 103,362.65/x
  3. Step 3: Cross multiply
    189,402.99x = 261,377.65 × 103,362.65
  4. Step 4: Simplify right side
    189,402.99x = 27,016,687,126.63
  5. Step 5: Solve for x
    x = 27,016,687,126.63/189,402.99
  6. Step 6: Final answer
    x = 142,641.29

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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.