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Finding the Fourth Proportional to 98,433.90, 135,791.55 and 64,427.42

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Solution

The fourth proportional to 98,433.90, 135,791.55 and 64,427.42 is: 88,878.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,433.90 : 135,791.55 = 64,427.42 : x
  2. Step 2: Convert to fraction form
    98,433.90/135,791.55 = 64,427.42/x
  3. Step 3: Cross multiply
    98,433.90x = 135,791.55 × 64,427.42
  4. Step 4: Simplify right side
    98,433.90x = 8,748,699,224.30
  5. Step 5: Solve for x
    x = 8,748,699,224.30/98,433.90
  6. Step 6: Final answer
    x = 88,878.93

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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.