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Finding the Fourth Proportional to 78,677.88, 117,885.54 and 55,262.40

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Solution

The fourth proportional to 78,677.88, 117,885.54 and 55,262.40 is: 82,801.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,677.88 : 117,885.54 = 55,262.40 : x
  2. Step 2: Convert to fraction form
    78,677.88/117,885.54 = 55,262.40/x
  3. Step 3: Cross multiply
    78,677.88x = 117,885.54 × 55,262.40
  4. Step 4: Simplify right side
    78,677.88x = 6,514,637,865.70
  5. Step 5: Solve for x
    x = 6,514,637,865.70/78,677.88
  6. Step 6: Final answer
    x = 82,801.39

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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.