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Finding the Fourth Proportional to 71,978,061.68, 99,329,506.08 and 38,938,301.36

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Solution

The fourth proportional to 71,978,061.68, 99,329,506.08 and 38,938,301.36 is: 53,734,737.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,978,061.68 : 99,329,506.08 = 38,938,301.36 : x
  2. Step 2: Convert to fraction form
    71,978,061.68/99,329,506.08 = 38,938,301.36/x
  3. Step 3: Cross multiply
    71,978,061.68x = 99,329,506.08 × 38,938,301.36
  4. Step 4: Simplify right side
    71,978,061.68x = 3,867,722,241,682,992
  5. Step 5: Solve for x
    x = 3,867,722,241,682,992/71,978,061.68
  6. Step 6: Final answer
    x = 53,734,737.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.