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Finding the Fourth Proportional to 78,617.52, 108,598.32 and 62,812.80

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Solution

The fourth proportional to 78,617.52, 108,598.32 and 62,812.80 is: 86,766.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,617.52 : 108,598.32 = 62,812.80 : x
  2. Step 2: Convert to fraction form
    78,617.52/108,598.32 = 62,812.80/x
  3. Step 3: Cross multiply
    78,617.52x = 108,598.32 × 62,812.80
  4. Step 4: Simplify right side
    78,617.52x = 6,821,364,554.50
  5. Step 5: Solve for x
    x = 6,821,364,554.50/78,617.52
  6. Step 6: Final answer
    x = 86,766.47

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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.