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Finding the Fourth Proportional to 159,206.99, 219,706.74 and 86,610.55

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Solution

The fourth proportional to 159,206.99, 219,706.74 and 86,610.55 is: 119,523.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,206.99 : 219,706.74 = 86,610.55 : x
  2. Step 2: Convert to fraction form
    159,206.99/219,706.74 = 86,610.55/x
  3. Step 3: Cross multiply
    159,206.99x = 219,706.74 × 86,610.55
  4. Step 4: Simplify right side
    159,206.99x = 19,028,922,501.47
  5. Step 5: Solve for x
    x = 19,028,922,501.47/159,206.99
  6. Step 6: Final answer
    x = 119,523.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.