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Finding the Fourth Proportional to 93,431.80, 140,147.70 and 54,065.80

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Solution

The fourth proportional to 93,431.80, 140,147.70 and 54,065.80 is: 81,098.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,431.80 : 140,147.70 = 54,065.80 : x
  2. Step 2: Convert to fraction form
    93,431.80/140,147.70 = 54,065.80/x
  3. Step 3: Cross multiply
    93,431.80x = 140,147.70 × 54,065.80
  4. Step 4: Simplify right side
    93,431.80x = 7,577,197,518.66
  5. Step 5: Solve for x
    x = 7,577,197,518.66/93,431.80
  6. Step 6: Final answer
    x = 81,098.70

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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.