Home / 136,077.36-187,809.95-78,751.58

Finding the Fourth Proportional to 136,077.36, 187,809.95 and 78,751.58

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Solution

The fourth proportional to 136,077.36, 187,809.95 and 78,751.58 is: 108,690.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,077.36 : 187,809.95 = 78,751.58 : x
  2. Step 2: Convert to fraction form
    136,077.36/187,809.95 = 78,751.58/x
  3. Step 3: Cross multiply
    136,077.36x = 187,809.95 × 78,751.58
  4. Step 4: Simplify right side
    136,077.36x = 14,790,329,560.05
  5. Step 5: Solve for x
    x = 14,790,329,560.05/136,077.36
  6. Step 6: Final answer
    x = 108,690.60

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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.