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Finding the Fourth Proportional to 78,636.44, 108,519.58 and 42,827.16

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Solution

The fourth proportional to 78,636.44, 108,519.58 and 42,827.16 is: 59,102.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,636.44 : 108,519.58 = 42,827.16 : x
  2. Step 2: Convert to fraction form
    78,636.44/108,519.58 = 42,827.16/x
  3. Step 3: Cross multiply
    78,636.44x = 108,519.58 × 42,827.16
  4. Step 4: Simplify right side
    78,636.44x = 4,647,585,415.79
  5. Step 5: Solve for x
    x = 4,647,585,415.79/78,636.44
  6. Step 6: Final answer
    x = 59,102.18

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1.5x scale

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.