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Finding the Fourth Proportional to 78,015.60, 117,035.54 and 25,412.84

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Solution

The fourth proportional to 78,015.60, 117,035.54 and 25,412.84 is: 38,123.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,015.60 : 117,035.54 = 25,412.84 : x
  2. Step 2: Convert to fraction form
    78,015.60/117,035.54 = 25,412.84/x
  3. Step 3: Cross multiply
    78,015.60x = 117,035.54 × 25,412.84
  4. Step 4: Simplify right side
    78,015.60x = 2,974,205,452.33
  5. Step 5: Solve for x
    x = 2,974,205,452.33/78,015.60
  6. Step 6: Final answer
    x = 38,123.21

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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.