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Finding the Fourth Proportional to 86,676.80, 130,015.20 and 70,930.40

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Solution

The fourth proportional to 86,676.80, 130,015.20 and 70,930.40 is: 106,395.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,676.80 : 130,015.20 = 70,930.40 : x
  2. Step 2: Convert to fraction form
    86,676.80/130,015.20 = 70,930.40/x
  3. Step 3: Cross multiply
    86,676.80x = 130,015.20 × 70,930.40
  4. Step 4: Simplify right side
    86,676.80x = 9,222,030,142.08
  5. Step 5: Solve for x
    x = 9,222,030,142.08/86,676.80
  6. Step 6: Final answer
    x = 106,395.60

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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.