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Finding the Fourth Proportional to 86,900.80, 130,120.80 and 68,468.80

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Solution

The fourth proportional to 86,900.80, 130,120.80 and 68,468.80 is: 102,521.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,900.80 : 130,120.80 = 68,468.80 : x
  2. Step 2: Convert to fraction form
    86,900.80/130,120.80 = 68,468.80/x
  3. Step 3: Cross multiply
    86,900.80x = 130,120.80 × 68,468.80
  4. Step 4: Simplify right side
    86,900.80x = 8,909,215,031.04
  5. Step 5: Solve for x
    x = 8,909,215,031.04/86,900.80
  6. Step 6: Final answer
    x = 102,521.67

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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.