Home / 138,950.10-191,782.62-78,555.69

Finding the Fourth Proportional to 138,950.10, 191,782.62 and 78,555.69

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Solution

The fourth proportional to 138,950.10, 191,782.62 and 78,555.69 is: 108,424.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,950.10 : 191,782.62 = 78,555.69 : x
  2. Step 2: Convert to fraction form
    138,950.10/191,782.62 = 78,555.69/x
  3. Step 3: Cross multiply
    138,950.10x = 191,782.62 × 78,555.69
  4. Step 4: Simplify right side
    138,950.10x = 15,065,616,044.11
  5. Step 5: Solve for x
    x = 15,065,616,044.11/138,950.10
  6. Step 6: Final answer
    x = 108,424.65

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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.