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Finding the Fourth Proportional to 86,846.40, 130,269.60 and 80,431.20

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Solution

The fourth proportional to 86,846.40, 130,269.60 and 80,431.20 is: 120,646.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,846.40 : 130,269.60 = 80,431.20 : x
  2. Step 2: Convert to fraction form
    86,846.40/130,269.60 = 80,431.20/x
  3. Step 3: Cross multiply
    86,846.40x = 130,269.60 × 80,431.20
  4. Step 4: Simplify right side
    86,846.40x = 10,477,740,251.52
  5. Step 5: Solve for x
    x = 10,477,740,251.52/86,846.40
  6. Step 6: Final answer
    x = 120,646.80

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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.