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Finding the Fourth Proportional to 338,720.62, 508,081.14 and 86,020.06

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Solution

The fourth proportional to 338,720.62, 508,081.14 and 86,020.06 is: 129,030.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,720.62 : 508,081.14 = 86,020.06 : x
  2. Step 2: Convert to fraction form
    338,720.62/508,081.14 = 86,020.06/x
  3. Step 3: Cross multiply
    338,720.62x = 508,081.14 × 86,020.06
  4. Step 4: Simplify right side
    338,720.62x = 43,705,168,564.94
  5. Step 5: Solve for x
    x = 43,705,168,564.94/338,720.62
  6. Step 6: Final answer
    x = 129,030.14

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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.