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Finding the Fourth Proportional to 78,975.66, 118,482.92 and 55,647.66

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Solution

The fourth proportional to 78,975.66, 118,482.92 and 55,647.66 is: 83,485.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,975.66 : 118,482.92 = 55,647.66 : x
  2. Step 2: Convert to fraction form
    78,975.66/118,482.92 = 55,647.66/x
  3. Step 3: Cross multiply
    78,975.66x = 118,482.92 × 55,647.66
  4. Step 4: Simplify right side
    78,975.66x = 6,593,297,247.97
  5. Step 5: Solve for x
    x = 6,593,297,247.97/78,975.66
  6. Step 6: Final answer
    x = 83,485.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.