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Finding the Fourth Proportional to 98,433.65, 135,791.19 and 64,427.18

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Solution

The fourth proportional to 98,433.65, 135,791.19 and 64,427.18 is: 88,878.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,433.65 : 135,791.19 = 64,427.18 : x
  2. Step 2: Convert to fraction form
    98,433.65/135,791.19 = 64,427.18/x
  3. Step 3: Cross multiply
    98,433.65x = 135,791.19 × 64,427.18
  4. Step 4: Simplify right side
    98,433.65x = 8,748,642,761.59
  5. Step 5: Solve for x
    x = 8,748,642,761.59/98,433.65
  6. Step 6: Final answer
    x = 88,878.57

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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.