Home / 103,121.18-142,041.03-72,853.96

Finding the Fourth Proportional to 103,121.18, 142,041.03 and 72,853.96

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Solution

The fourth proportional to 103,121.18, 142,041.03 and 72,853.96 is: 100,350.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,121.18 : 142,041.03 = 72,853.96 : x
  2. Step 2: Convert to fraction form
    103,121.18/142,041.03 = 72,853.96/x
  3. Step 3: Cross multiply
    103,121.18x = 142,041.03 × 72,853.96
  4. Step 4: Simplify right side
    103,121.18x = 10,348,251,162.88
  5. Step 5: Solve for x
    x = 10,348,251,162.88/103,121.18
  6. Step 6: Final answer
    x = 100,350.40

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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.