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Finding the Fourth Proportional to 85,872.42, 118,479.71 and 55,659.02

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Solution

The fourth proportional to 85,872.42, 118,479.71 and 55,659.02 is: 76,793.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,872.42 : 118,479.71 = 55,659.02 : x
  2. Step 2: Convert to fraction form
    85,872.42/118,479.71 = 55,659.02/x
  3. Step 3: Cross multiply
    85,872.42x = 118,479.71 × 55,659.02
  4. Step 4: Simplify right side
    85,872.42x = 6,594,464,095.23
  5. Step 5: Solve for x
    x = 6,594,464,095.23/85,872.42
  6. Step 6: Final answer
    x = 76,793.74

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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.