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Finding the Fourth Proportional to 68,851.20, 103,265.40 and 64,368.12

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Solution

The fourth proportional to 68,851.20, 103,265.40 and 64,368.12 is: 96,541.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,851.20 : 103,265.40 = 64,368.12 : x
  2. Step 2: Convert to fraction form
    68,851.20/103,265.40 = 64,368.12/x
  3. Step 3: Cross multiply
    68,851.20x = 103,265.40 × 64,368.12
  4. Step 4: Simplify right side
    68,851.20x = 6,646,999,659.05
  5. Step 5: Solve for x
    x = 6,646,999,659.05/68,851.20
  6. Step 6: Final answer
    x = 96,541.52

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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.