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Finding the Fourth Proportional to 86,910.80, 130,463.40 and 81,200.30

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Solution

The fourth proportional to 86,910.80, 130,463.40 and 81,200.30 is: 121,891.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,910.80 : 130,463.40 = 81,200.30 : x
  2. Step 2: Convert to fraction form
    86,910.80/130,463.40 = 81,200.30/x
  3. Step 3: Cross multiply
    86,910.80x = 130,463.40 × 81,200.30
  4. Step 4: Simplify right side
    86,910.80x = 10,593,667,219.02
  5. Step 5: Solve for x
    x = 10,593,667,219.02/86,910.80
  6. Step 6: Final answer
    x = 121,891.26

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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.