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Finding the Fourth Proportional to 159,040.71, 219,476.67 and 87,428.07

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Solution

The fourth proportional to 159,040.71, 219,476.67 and 87,428.07 is: 120,651.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,040.71 : 219,476.67 = 87,428.07 : x
  2. Step 2: Convert to fraction form
    159,040.71/219,476.67 = 87,428.07/x
  3. Step 3: Cross multiply
    159,040.71x = 219,476.67 × 87,428.07
  4. Step 4: Simplify right side
    159,040.71x = 19,188,421,668.13
  5. Step 5: Solve for x
    x = 19,188,421,668.13/159,040.71
  6. Step 6: Final answer
    x = 120,651.01

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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.