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Finding the Fourth Proportional to 71,318,805.10, 106,978,207.65 and 70,646,958.70

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Solution

The fourth proportional to 71,318,805.10, 106,978,207.65 and 70,646,958.70 is: 105,970,438.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,318,805.10 : 106,978,207.65 = 70,646,958.70 : x
  2. Step 2: Convert to fraction form
    71,318,805.10/106,978,207.65 = 70,646,958.70/x
  3. Step 3: Cross multiply
    71,318,805.10x = 106,978,207.65 × 70,646,958.70
  4. Step 4: Simplify right side
    71,318,805.10x = 7,557,685,017,649,575
  5. Step 5: Solve for x
    x = 7,557,685,017,649,575/71,318,805.10
  6. Step 6: Final answer
    x = 105,970,438.05

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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.