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Finding the Fourth Proportional to 78,591.60, 117,655.74 and 51,888.60

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Solution

The fourth proportional to 78,591.60, 117,655.74 and 51,888.60 is: 77,679.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,591.60 : 117,655.74 = 51,888.60 : x
  2. Step 2: Convert to fraction form
    78,591.60/117,655.74 = 51,888.60/x
  3. Step 3: Cross multiply
    78,591.60x = 117,655.74 × 51,888.60
  4. Step 4: Simplify right side
    78,591.60x = 6,104,991,630.56
  5. Step 5: Solve for x
    x = 6,104,991,630.56/78,591.60
  6. Step 6: Final answer
    x = 77,679.95

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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.