Home / 142,594.78-196,778.40-78,931.21

Finding the Fourth Proportional to 142,594.78, 196,778.40 and 78,931.21

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Solution

The fourth proportional to 142,594.78, 196,778.40 and 78,931.21 is: 108,923.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,594.78 : 196,778.40 = 78,931.21 : x
  2. Step 2: Convert to fraction form
    142,594.78/196,778.40 = 78,931.21/x
  3. Step 3: Cross multiply
    142,594.78x = 196,778.40 × 78,931.21
  4. Step 4: Simplify right side
    142,594.78x = 15,531,957,213.86
  5. Step 5: Solve for x
    x = 15,531,957,213.86/142,594.78
  6. Step 6: Final answer
    x = 108,923.74

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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.