Home / 135,036.84-186,340.08-78,451.92

Finding the Fourth Proportional to 135,036.84, 186,340.08 and 78,451.92

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Solution

The fourth proportional to 135,036.84, 186,340.08 and 78,451.92 is: 108,257.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,036.84 : 186,340.08 = 78,451.92 : x
  2. Step 2: Convert to fraction form
    135,036.84/186,340.08 = 78,451.92/x
  3. Step 3: Cross multiply
    135,036.84x = 186,340.08 × 78,451.92
  4. Step 4: Simplify right side
    135,036.84x = 14,618,737,048.95
  5. Step 5: Solve for x
    x = 14,618,737,048.95/135,036.84
  6. Step 6: Final answer
    x = 108,257.40

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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.