Home / 136,328.03-188,130.89-78,975.17

Finding the Fourth Proportional to 136,328.03, 188,130.89 and 78,975.17

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Solution

The fourth proportional to 136,328.03, 188,130.89 and 78,975.17 is: 108,984.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,328.03 : 188,130.89 = 78,975.17 : x
  2. Step 2: Convert to fraction form
    136,328.03/188,130.89 = 78,975.17/x
  3. Step 3: Cross multiply
    136,328.03x = 188,130.89 × 78,975.17
  4. Step 4: Simplify right side
    136,328.03x = 14,857,667,684.47
  5. Step 5: Solve for x
    x = 14,857,667,684.47/136,328.03
  6. Step 6: Final answer
    x = 108,984.69

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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.