Home / 103,138.12-142,178.52-80,451.64

Finding the Fourth Proportional to 103,138.12, 142,178.52 and 80,451.64

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Solution

The fourth proportional to 103,138.12, 142,178.52 and 80,451.64 is: 110,904.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,138.12 : 142,178.52 = 80,451.64 : x
  2. Step 2: Convert to fraction form
    103,138.12/142,178.52 = 80,451.64/x
  3. Step 3: Cross multiply
    103,138.12x = 142,178.52 × 80,451.64
  4. Step 4: Simplify right side
    103,138.12x = 11,438,495,106.77
  5. Step 5: Solve for x
    x = 11,438,495,106.77/103,138.12
  6. Step 6: Final answer
    x = 110,904.63

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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.