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Finding the Fourth Proportional to 98,661.42, 136,063.44 and 64,657.71

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Solution

The fourth proportional to 98,661.42, 136,063.44 and 64,657.71 is: 89,169.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,661.42 : 136,063.44 = 64,657.71 : x
  2. Step 2: Convert to fraction form
    98,661.42/136,063.44 = 64,657.71/x
  3. Step 3: Cross multiply
    98,661.42x = 136,063.44 × 64,657.71
  4. Step 4: Simplify right side
    98,661.42x = 8,797,550,445.12
  5. Step 5: Solve for x
    x = 8,797,550,445.12/98,661.42
  6. Step 6: Final answer
    x = 89,169.10

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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.