Home / 135,550.92-187,055.16-78,192.60

Finding the Fourth Proportional to 135,550.92, 187,055.16 and 78,192.60

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Solution

The fourth proportional to 135,550.92, 187,055.16 and 78,192.60 is: 107,902.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,550.92 : 187,055.16 = 78,192.60 : x
  2. Step 2: Convert to fraction form
    135,550.92/187,055.16 = 78,192.60/x
  3. Step 3: Cross multiply
    135,550.92x = 187,055.16 × 78,192.60
  4. Step 4: Simplify right side
    135,550.92x = 14,626,329,303.82
  5. Step 5: Solve for x
    x = 14,626,329,303.82/135,550.92
  6. Step 6: Final answer
    x = 107,902.84

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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.