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Finding the Fourth Proportional to 78,071.84, 117,126.42 and 25,481.42

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Solution

The fourth proportional to 78,071.84, 117,126.42 and 25,481.42 is: 38,228.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,071.84 : 117,126.42 = 25,481.42 : x
  2. Step 2: Convert to fraction form
    78,071.84/117,126.42 = 25,481.42/x
  3. Step 3: Cross multiply
    78,071.84x = 117,126.42 × 25,481.42
  4. Step 4: Simplify right side
    78,071.84x = 2,984,547,501.12
  5. Step 5: Solve for x
    x = 2,984,547,501.12/78,071.84
  6. Step 6: Final answer
    x = 38,228.22

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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.