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Finding the Fourth Proportional to 98,118.86, 135,445.16 and 66,330.80

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Solution

The fourth proportional to 98,118.86, 135,445.16 and 66,330.80 is: 91,564.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,118.86 : 135,445.16 = 66,330.80 : x
  2. Step 2: Convert to fraction form
    98,118.86/135,445.16 = 66,330.80/x
  3. Step 3: Cross multiply
    98,118.86x = 135,445.16 × 66,330.80
  4. Step 4: Simplify right side
    98,118.86x = 8,984,185,818.93
  5. Step 5: Solve for x
    x = 8,984,185,818.93/98,118.86
  6. Step 6: Final answer
    x = 91,564.31

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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.