Home / 86,815.80-130,515.30-73,985.40

Finding the Fourth Proportional to 86,815.80, 130,515.30 and 73,985.40

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Solution

The fourth proportional to 86,815.80, 130,515.30 and 73,985.40 is: 111,226.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,815.80 : 130,515.30 = 73,985.40 : x
  2. Step 2: Convert to fraction form
    86,815.80/130,515.30 = 73,985.40/x
  3. Step 3: Cross multiply
    86,815.80x = 130,515.30 × 73,985.40
  4. Step 4: Simplify right side
    86,815.80x = 9,656,226,676.62
  5. Step 5: Solve for x
    x = 9,656,226,676.62/86,815.80
  6. Step 6: Final answer
    x = 111,226.60

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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.