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Finding the Fourth Proportional to 78,606.80, 117,910.20 and 26,021.60

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Solution

The fourth proportional to 78,606.80, 117,910.20 and 26,021.60 is: 39,032.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,606.80 : 117,910.20 = 26,021.60 : x
  2. Step 2: Convert to fraction form
    78,606.80/117,910.20 = 26,021.60/x
  3. Step 3: Cross multiply
    78,606.80x = 117,910.20 × 26,021.60
  4. Step 4: Simplify right side
    78,606.80x = 3,068,212,060.32
  5. Step 5: Solve for x
    x = 3,068,212,060.32/78,606.80
  6. Step 6: Final answer
    x = 39,032.40

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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.