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Finding the Fourth Proportional to 71,773,100.40, 107,531,346.60 and 43,678,412.40

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Solution

The fourth proportional to 71,773,100.40, 107,531,346.60 and 43,678,412.40 is: 65,439,537.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,773,100.40 : 107,531,346.60 = 43,678,412.40 : x
  2. Step 2: Convert to fraction form
    71,773,100.40/107,531,346.60 = 43,678,412.40/x
  3. Step 3: Cross multiply
    71,773,100.40x = 107,531,346.60 × 43,678,412.40
  4. Step 4: Simplify right side
    71,773,100.40x = 4,696,798,502,722,137
  5. Step 5: Solve for x
    x = 4,696,798,502,722,137/71,773,100.40
  6. Step 6: Final answer
    x = 65,439,537.61

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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.