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Finding the Fourth Proportional to 84,811.60, 127,168.80 and 25,638.40

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Solution

The fourth proportional to 84,811.60, 127,168.80 and 25,638.40 is: 38,442.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,811.60 : 127,168.80 = 25,638.40 : x
  2. Step 2: Convert to fraction form
    84,811.60/127,168.80 = 25,638.40/x
  3. Step 3: Cross multiply
    84,811.60x = 127,168.80 × 25,638.40
  4. Step 4: Simplify right side
    84,811.60x = 3,260,404,561.92
  5. Step 5: Solve for x
    x = 3,260,404,561.92/84,811.60
  6. Step 6: Final answer
    x = 38,442.91

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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.