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Finding the Fourth Proportional to 86,682.30, 130,023.45 and 81,498.30

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Solution

The fourth proportional to 86,682.30, 130,023.45 and 81,498.30 is: 122,247.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,682.30 : 130,023.45 = 81,498.30 : x
  2. Step 2: Convert to fraction form
    86,682.30/130,023.45 = 81,498.30/x
  3. Step 3: Cross multiply
    86,682.30x = 130,023.45 × 81,498.30
  4. Step 4: Simplify right side
    86,682.30x = 10,596,690,135.14
  5. Step 5: Solve for x
    x = 10,596,690,135.14/86,682.30
  6. Step 6: Final answer
    x = 122,247.45

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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.