Home / 138,734.16-191,453.79-78,307.35

Finding the Fourth Proportional to 138,734.16, 191,453.79 and 78,307.35

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Solution

The fourth proportional to 138,734.16, 191,453.79 and 78,307.35 is: 108,064.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,734.16 : 191,453.79 = 78,307.35 : x
  2. Step 2: Convert to fraction form
    138,734.16/191,453.79 = 78,307.35/x
  3. Step 3: Cross multiply
    138,734.16x = 191,453.79 × 78,307.35
  4. Step 4: Simplify right side
    138,734.16x = 14,992,238,942.36
  5. Step 5: Solve for x
    x = 14,992,238,942.36/138,734.16
  6. Step 6: Final answer
    x = 108,064.51

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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.