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Finding the Fourth Proportional to 68,375,628.60, 102,563,442.90 and 20,506,572.60

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Solution

The fourth proportional to 68,375,628.60, 102,563,442.90 and 20,506,572.60 is: 30,759,858.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,375,628.60 : 102,563,442.90 = 20,506,572.60 : x
  2. Step 2: Convert to fraction form
    68,375,628.60/102,563,442.90 = 20,506,572.60/x
  3. Step 3: Cross multiply
    68,375,628.60x = 102,563,442.90 × 20,506,572.60
  4. Step 4: Simplify right side
    68,375,628.60x = 2,103,224,687,934,804.75
  5. Step 5: Solve for x
    x = 2,103,224,687,934,804.75/68,375,628.60
  6. Step 6: Final answer
    x = 30,759,858.90

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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.