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Finding the Fourth Proportional to 78,952,981.20, 118,429,471.80 and 33,508,870.80

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Solution

The fourth proportional to 78,952,981.20, 118,429,471.80 and 33,508,870.80 is: 50,263,306.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,952,981.20 : 118,429,471.80 = 33,508,870.80 : x
  2. Step 2: Convert to fraction form
    78,952,981.20/118,429,471.80 = 33,508,870.80/x
  3. Step 3: Cross multiply
    78,952,981.20x = 118,429,471.80 × 33,508,870.80
  4. Step 4: Simplify right side
    78,952,981.20x = 3,968,437,869,458,443.50
  5. Step 5: Solve for x
    x = 3,968,437,869,458,443.50/78,952,981.20
  6. Step 6: Final answer
    x = 50,263,306.20

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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.