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Finding the Fourth Proportional to 28,081,801.40, 42,122,702.10 and 18,340,028.60

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Solution

The fourth proportional to 28,081,801.40, 42,122,702.10 and 18,340,028.60 is: 27,510,042.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,081,801.40 : 42,122,702.10 = 18,340,028.60 : x
  2. Step 2: Convert to fraction form
    28,081,801.40/42,122,702.10 = 18,340,028.60/x
  3. Step 3: Cross multiply
    28,081,801.40x = 42,122,702.10 × 18,340,028.60
  4. Step 4: Simplify right side
    28,081,801.40x = 772,531,561,223,280.12
  5. Step 5: Solve for x
    x = 772,531,561,223,280.12/28,081,801.40
  6. Step 6: Final answer
    x = 27,510,042.90

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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.