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Finding the Fourth Proportional to 9,985,488.80, 14,978,233.20 and 4,946,640.80

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Solution

The fourth proportional to 9,985,488.80, 14,978,233.20 and 4,946,640.80 is: 7,419,961.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,985,488.80 : 14,978,233.20 = 4,946,640.80 : x
  2. Step 2: Convert to fraction form
    9,985,488.80/14,978,233.20 = 4,946,640.80/x
  3. Step 3: Cross multiply
    9,985,488.80x = 14,978,233.20 × 4,946,640.80
  4. Step 4: Simplify right side
    9,985,488.80x = 74,091,939,459,034.55
  5. Step 5: Solve for x
    x = 74,091,939,459,034.55/9,985,488.80
  6. Step 6: Final answer
    x = 7,419,961.20

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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.