Home / 86,704.12-130,030.20-45,128.44

Finding the Fourth Proportional to 86,704.12, 130,030.20 and 45,128.44

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Solution

The fourth proportional to 86,704.12, 130,030.20 and 45,128.44 is: 67,679.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,704.12 : 130,030.20 = 45,128.44 : x
  2. Step 2: Convert to fraction form
    86,704.12/130,030.20 = 45,128.44/x
  3. Step 3: Cross multiply
    86,704.12x = 130,030.20 × 45,128.44
  4. Step 4: Simplify right side
    86,704.12x = 5,868,060,078.89
  5. Step 5: Solve for x
    x = 5,868,060,078.89/86,704.12
  6. Step 6: Final answer
    x = 67,679.14

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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.