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Finding the Fourth Proportional to 86,680.80, 130,078.80 and 49,240.80

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Solution

The fourth proportional to 86,680.80, 130,078.80 and 49,240.80 is: 73,893.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,680.80 : 130,078.80 = 49,240.80 : x
  2. Step 2: Convert to fraction form
    86,680.80/130,078.80 = 49,240.80/x
  3. Step 3: Cross multiply
    86,680.80x = 130,078.80 × 49,240.80
  4. Step 4: Simplify right side
    86,680.80x = 6,405,184,175.04
  5. Step 5: Solve for x
    x = 6,405,184,175.04/86,680.80
  6. Step 6: Final answer
    x = 73,893.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.