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Finding the Fourth Proportional to 78,000.84, 117,013.41 and 25,398.09

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Solution

The fourth proportional to 78,000.84, 117,013.41 and 25,398.09 is: 38,101.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,000.84 : 117,013.41 = 25,398.09 : x
  2. Step 2: Convert to fraction form
    78,000.84/117,013.41 = 25,398.09/x
  3. Step 3: Cross multiply
    78,000.84x = 117,013.41 × 25,398.09
  4. Step 4: Simplify right side
    78,000.84x = 2,971,917,118.39
  5. Step 5: Solve for x
    x = 2,971,917,118.39/78,000.84
  6. Step 6: Final answer
    x = 38,101.09

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1.5x scale

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.