Home / 135,825.32-187,448.04-78,475.79

Finding the Fourth Proportional to 135,825.32, 187,448.04 and 78,475.79

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Solution

The fourth proportional to 135,825.32, 187,448.04 and 78,475.79 is: 108,301.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,825.32 : 187,448.04 = 78,475.79 : x
  2. Step 2: Convert to fraction form
    135,825.32/187,448.04 = 78,475.79/x
  3. Step 3: Cross multiply
    135,825.32x = 187,448.04 × 78,475.79
  4. Step 4: Simplify right side
    135,825.32x = 14,710,133,022.95
  5. Step 5: Solve for x
    x = 14,710,133,022.95/135,825.32
  6. Step 6: Final answer
    x = 108,301.85

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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.