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Finding the Fourth Proportional to 86,866.80, 130,578.60 and 80,703.60

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Solution

The fourth proportional to 86,866.80, 130,578.60 and 80,703.60 is: 121,314.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,866.80 : 130,578.60 = 80,703.60 : x
  2. Step 2: Convert to fraction form
    86,866.80/130,578.60 = 80,703.60/x
  3. Step 3: Cross multiply
    86,866.80x = 130,578.60 × 80,703.60
  4. Step 4: Simplify right side
    86,866.80x = 10,538,163,102.96
  5. Step 5: Solve for x
    x = 10,538,163,102.96/86,866.80
  6. Step 6: Final answer
    x = 121,314.05

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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.