Home / 142,748.38-196,995.28-78,213.40

Finding the Fourth Proportional to 142,748.38, 196,995.28 and 78,213.40

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Solution

The fourth proportional to 142,748.38, 196,995.28 and 78,213.40 is: 107,935.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,748.38 : 196,995.28 = 78,213.40 : x
  2. Step 2: Convert to fraction form
    142,748.38/196,995.28 = 78,213.40/x
  3. Step 3: Cross multiply
    142,748.38x = 196,995.28 × 78,213.40
  4. Step 4: Simplify right side
    142,748.38x = 15,407,670,632.75
  5. Step 5: Solve for x
    x = 15,407,670,632.75/142,748.38
  6. Step 6: Final answer
    x = 107,935.87

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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.