Home / 86,856.62-129,989.07-72,832.50

Finding the Fourth Proportional to 86,856.62, 129,989.07 and 72,832.50

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Solution

The fourth proportional to 86,856.62, 129,989.07 and 72,832.50 is: 109,000.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,856.62 : 129,989.07 = 72,832.50 : x
  2. Step 2: Convert to fraction form
    86,856.62/129,989.07 = 72,832.50/x
  3. Step 3: Cross multiply
    86,856.62x = 129,989.07 × 72,832.50
  4. Step 4: Simplify right side
    86,856.62x = 9,467,428,940.78
  5. Step 5: Solve for x
    x = 9,467,428,940.78/86,856.62
  6. Step 6: Final answer
    x = 109,000.67

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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.