Home / 139,098.84-191,965.88-78,669.44

Finding the Fourth Proportional to 139,098.84, 191,965.88 and 78,669.44

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Solution

The fourth proportional to 139,098.84, 191,965.88 and 78,669.44 is: 108,569.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,098.84 : 191,965.88 = 78,669.44 : x
  2. Step 2: Convert to fraction form
    139,098.84/191,965.88 = 78,669.44/x
  3. Step 3: Cross multiply
    139,098.84x = 191,965.88 × 78,669.44
  4. Step 4: Simplify right side
    139,098.84x = 15,101,849,315.23
  5. Step 5: Solve for x
    x = 15,101,849,315.23/139,098.84
  6. Step 6: Final answer
    x = 108,569.20

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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.