Home / 142,031.41-196,003.20-78,369.21

Finding the Fourth Proportional to 142,031.41, 196,003.20 and 78,369.21

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Solution

The fourth proportional to 142,031.41, 196,003.20 and 78,369.21 is: 108,149.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,031.41 : 196,003.20 = 78,369.21 : x
  2. Step 2: Convert to fraction form
    142,031.41/196,003.20 = 78,369.21/x
  3. Step 3: Cross multiply
    142,031.41x = 196,003.20 × 78,369.21
  4. Step 4: Simplify right side
    142,031.41x = 15,360,615,941.47
  5. Step 5: Solve for x
    x = 15,360,615,941.47/142,031.41
  6. Step 6: Final answer
    x = 108,149.43

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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.