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Finding the Fourth Proportional to 77,919.40, 116,870.46 and 22,515.40

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Solution

The fourth proportional to 77,919.40, 116,870.46 and 22,515.40 is: 33,770.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,919.40 : 116,870.46 = 22,515.40 : x
  2. Step 2: Convert to fraction form
    77,919.40/116,870.46 = 22,515.40/x
  3. Step 3: Cross multiply
    77,919.40x = 116,870.46 × 22,515.40
  4. Step 4: Simplify right side
    77,919.40x = 2,631,385,155.08
  5. Step 5: Solve for x
    x = 2,631,385,155.08/77,919.40
  6. Step 6: Final answer
    x = 33,770.60

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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.