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Finding the Fourth Proportional to 78,803.70, 118,220.13 and 25,509.75

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Solution

The fourth proportional to 78,803.70, 118,220.13 and 25,509.75 is: 38,269.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,803.70 : 118,220.13 = 25,509.75 : x
  2. Step 2: Convert to fraction form
    78,803.70/118,220.13 = 25,509.75/x
  3. Step 3: Cross multiply
    78,803.70x = 118,220.13 × 25,509.75
  4. Step 4: Simplify right side
    78,803.70x = 3,015,765,961.27
  5. Step 5: Solve for x
    x = 3,015,765,961.27/78,803.70
  6. Step 6: Final answer
    x = 38,269.34

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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.