Home / 142,781.86-197,038.56-79,119.66

Finding the Fourth Proportional to 142,781.86, 197,038.56 and 79,119.66

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Solution

The fourth proportional to 142,781.86, 197,038.56 and 79,119.66 is: 109,184.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,781.86 : 197,038.56 = 79,119.66 : x
  2. Step 2: Convert to fraction form
    142,781.86/197,038.56 = 79,119.66/x
  3. Step 3: Cross multiply
    142,781.86x = 197,038.56 × 79,119.66
  4. Step 4: Simplify right side
    142,781.86x = 15,589,624,244.25
  5. Step 5: Solve for x
    x = 15,589,624,244.25/142,781.86
  6. Step 6: Final answer
    x = 109,184.90

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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.