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Finding the Fourth Proportional to 7,172,445.20, 9,897,978.06 and 4,074,974.01

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Solution

The fourth proportional to 7,172,445.20, 9,897,978.06 and 4,074,974.01 is: 5,623,466.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,172,445.20 : 9,897,978.06 = 4,074,974.01 : x
  2. Step 2: Convert to fraction form
    7,172,445.20/9,897,978.06 = 4,074,974.01/x
  3. Step 3: Cross multiply
    7,172,445.20x = 9,897,978.06 × 4,074,974.01
  4. Step 4: Simplify right side
    7,172,445.20x = 40,334,003,346,050.22
  5. Step 5: Solve for x
    x = 40,334,003,346,050.22/7,172,445.20
  6. Step 6: Final answer
    x = 5,623,466.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.