Home / 135,707.93-187,285.51-78,357.83

Finding the Fourth Proportional to 135,707.93, 187,285.51 and 78,357.83

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Solution

The fourth proportional to 135,707.93, 187,285.51 and 78,357.83 is: 108,138.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,707.93 : 187,285.51 = 78,357.83 : x
  2. Step 2: Convert to fraction form
    135,707.93/187,285.51 = 78,357.83/x
  3. Step 3: Cross multiply
    135,707.93x = 187,285.51 × 78,357.83
  4. Step 4: Simplify right side
    135,707.93x = 14,675,286,230.47
  5. Step 5: Solve for x
    x = 14,675,286,230.47/135,707.93
  6. Step 6: Final answer
    x = 108,138.76

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1.5x scale

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.