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Finding the Fourth Proportional to 93,428.40, 140,142.60 and 77,025.90

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Solution

The fourth proportional to 93,428.40, 140,142.60 and 77,025.90 is: 115,538.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,428.40 : 140,142.60 = 77,025.90 : x
  2. Step 2: Convert to fraction form
    93,428.40/140,142.60 = 77,025.90/x
  3. Step 3: Cross multiply
    93,428.40x = 140,142.60 × 77,025.90
  4. Step 4: Simplify right side
    93,428.40x = 10,794,609,893.34
  5. Step 5: Solve for x
    x = 10,794,609,893.34/93,428.40
  6. Step 6: Final answer
    x = 115,538.85

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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.