Home / 138,509.04-191,144.71-78,082.64

Finding the Fourth Proportional to 138,509.04, 191,144.71 and 78,082.64

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Solution

The fourth proportional to 138,509.04, 191,144.71 and 78,082.64 is: 107,755.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,509.04 : 191,144.71 = 78,082.64 : x
  2. Step 2: Convert to fraction form
    138,509.04/191,144.71 = 78,082.64/x
  3. Step 3: Cross multiply
    138,509.04x = 191,144.71 × 78,082.64
  4. Step 4: Simplify right side
    138,509.04x = 14,925,083,578.83
  5. Step 5: Solve for x
    x = 14,925,083,578.83/138,509.04
  6. Step 6: Final answer
    x = 107,755.30

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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.