Home / 86,719.58-130,138.50-39,972.86

Finding the Fourth Proportional to 86,719.58, 130,138.50 and 39,972.86

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Solution

The fourth proportional to 86,719.58, 130,138.50 and 39,972.86 is: 59,986.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,719.58 : 130,138.50 = 39,972.86 : x
  2. Step 2: Convert to fraction form
    86,719.58/130,138.50 = 39,972.86/x
  3. Step 3: Cross multiply
    86,719.58x = 130,138.50 × 39,972.86
  4. Step 4: Simplify right side
    86,719.58x = 5,202,008,041.11
  5. Step 5: Solve for x
    x = 5,202,008,041.11/86,719.58
  6. Step 6: Final answer
    x = 59,986.55

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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.