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Finding the Fourth Proportional to 84,248,652.60, 126,372,978.90 and 74,682,714.60

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Solution

The fourth proportional to 84,248,652.60, 126,372,978.90 and 74,682,714.60 is: 112,024,071.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,248,652.60 : 126,372,978.90 = 74,682,714.60 : x
  2. Step 2: Convert to fraction form
    84,248,652.60/126,372,978.90 = 74,682,714.60/x
  3. Step 3: Cross multiply
    84,248,652.60x = 126,372,978.90 × 74,682,714.60
  4. Step 4: Simplify right side
    84,248,652.60x = 9,437,877,116,340,522
  5. Step 5: Solve for x
    x = 9,437,877,116,340,522/84,248,652.60
  6. Step 6: Final answer
    x = 112,024,071.90

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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.