Home / 142,079.29-196,069.01-78,416.63

Finding the Fourth Proportional to 142,079.29, 196,069.01 and 78,416.63

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Solution

The fourth proportional to 142,079.29, 196,069.01 and 78,416.63 is: 108,214.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,079.29 : 196,069.01 = 78,416.63 : x
  2. Step 2: Convert to fraction form
    142,079.29/196,069.01 = 78,416.63/x
  3. Step 3: Cross multiply
    142,079.29x = 196,069.01 × 78,416.63
  4. Step 4: Simplify right side
    142,079.29x = 15,375,070,031.29
  5. Step 5: Solve for x
    x = 15,375,070,031.29/142,079.29
  6. Step 6: Final answer
    x = 108,214.72

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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.