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Finding the Fourth Proportional to 85,812.88, 118,397.78 and 67,607.08

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Solution

The fourth proportional to 85,812.88, 118,397.78 and 67,607.08 is: 93,278.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,812.88 : 118,397.78 = 67,607.08 : x
  2. Step 2: Convert to fraction form
    85,812.88/118,397.78 = 67,607.08/x
  3. Step 3: Cross multiply
    85,812.88x = 118,397.78 × 67,607.08
  4. Step 4: Simplify right side
    85,812.88x = 8,004,528,142.24
  5. Step 5: Solve for x
    x = 8,004,528,142.24/85,812.88
  6. Step 6: Final answer
    x = 93,278.87

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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.