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Finding the Fourth Proportional to 68,538.60, 102,807.90 and 57,652.20

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Solution

The fourth proportional to 68,538.60, 102,807.90 and 57,652.20 is: 86,478.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,538.60 : 102,807.90 = 57,652.20 : x
  2. Step 2: Convert to fraction form
    68,538.60/102,807.90 = 57,652.20/x
  3. Step 3: Cross multiply
    68,538.60x = 102,807.90 × 57,652.20
  4. Step 4: Simplify right side
    68,538.60x = 5,927,101,612.38
  5. Step 5: Solve for x
    x = 5,927,101,612.38/68,538.60
  6. Step 6: Final answer
    x = 86,478.30

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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.