Home / 80,901.27-121,369.19-28,312.47

Finding the Fourth Proportional to 80,901.27, 121,369.19 and 28,312.47

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Solution

The fourth proportional to 80,901.27, 121,369.19 and 28,312.47 is: 42,474.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,901.27 : 121,369.19 = 28,312.47 : x
  2. Step 2: Convert to fraction form
    80,901.27/121,369.19 = 28,312.47/x
  3. Step 3: Cross multiply
    80,901.27x = 121,369.19 × 28,312.47
  4. Step 4: Simplify right side
    80,901.27x = 3,436,261,409.24
  5. Step 5: Solve for x
    x = 3,436,261,409.24/80,901.27
  6. Step 6: Final answer
    x = 42,474.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.