Home / 135,916.32-187,553.53-78,559.35

Finding the Fourth Proportional to 135,916.32, 187,553.53 and 78,559.35

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Solution

The fourth proportional to 135,916.32, 187,553.53 and 78,559.35 is: 108,405.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,916.32 : 187,553.53 = 78,559.35 : x
  2. Step 2: Convert to fraction form
    135,916.32/187,553.53 = 78,559.35/x
  3. Step 3: Cross multiply
    135,916.32x = 187,553.53 × 78,559.35
  4. Step 4: Simplify right side
    135,916.32x = 14,734,083,407.01
  5. Step 5: Solve for x
    x = 14,734,083,407.01/135,916.32
  6. Step 6: Final answer
    x = 108,405.55

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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.