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Finding the Fourth Proportional to 78,821.20, 118,231.80 and 26,232.40

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Solution

The fourth proportional to 78,821.20, 118,231.80 and 26,232.40 is: 39,348.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,821.20 : 118,231.80 = 26,232.40 : x
  2. Step 2: Convert to fraction form
    78,821.20/118,231.80 = 26,232.40/x
  3. Step 3: Cross multiply
    78,821.20x = 118,231.80 × 26,232.40
  4. Step 4: Simplify right side
    78,821.20x = 3,101,503,870.32
  5. Step 5: Solve for x
    x = 3,101,503,870.32/78,821.20
  6. Step 6: Final answer
    x = 39,348.60

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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.