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Finding the Fourth Proportional to 86,645.52, 130,020.12 and 79,595.28

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Solution

The fourth proportional to 86,645.52, 130,020.12 and 79,595.28 is: 119,440.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,645.52 : 130,020.12 = 79,595.28 : x
  2. Step 2: Convert to fraction form
    86,645.52/130,020.12 = 79,595.28/x
  3. Step 3: Cross multiply
    86,645.52x = 130,020.12 × 79,595.28
  4. Step 4: Simplify right side
    86,645.52x = 10,348,987,857.03
  5. Step 5: Solve for x
    x = 10,348,987,857.03/86,645.52
  6. Step 6: Final answer
    x = 119,440.54

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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.