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Finding the Fourth Proportional to 78,591.88, 117,905.64 and 26,001.28

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Solution

The fourth proportional to 78,591.88, 117,905.64 and 26,001.28 is: 39,007.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,591.88 : 117,905.64 = 26,001.28 : x
  2. Step 2: Convert to fraction form
    78,591.88/117,905.64 = 26,001.28/x
  3. Step 3: Cross multiply
    78,591.88x = 117,905.64 × 26,001.28
  4. Step 4: Simplify right side
    78,591.88x = 3,065,697,559.22
  5. Step 5: Solve for x
    x = 3,065,697,559.22/78,591.88
  6. Step 6: Final answer
    x = 39,007.82

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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.