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Finding the Fourth Proportional to 68,375,643.10, 102,563,464.65 and 20,506,587.10

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Solution

The fourth proportional to 68,375,643.10, 102,563,464.65 and 20,506,587.10 is: 30,759,880.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,375,643.10 : 102,563,464.65 = 20,506,587.10 : x
  2. Step 2: Convert to fraction form
    68,375,643.10/102,563,464.65 = 20,506,587.10/x
  3. Step 3: Cross multiply
    68,375,643.10x = 102,563,464.65 × 20,506,587.10
  4. Step 4: Simplify right side
    68,375,643.10x = 2,103,226,621,122,996.25
  5. Step 5: Solve for x
    x = 2,103,226,621,122,996.25/68,375,643.10
  6. Step 6: Final answer
    x = 30,759,880.65

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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.