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Finding the Fourth Proportional to 102,040.70, 140,800.68 and 56,719.04

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Solution

The fourth proportional to 102,040.70, 140,800.68 and 56,719.04 is: 78,263.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,040.70 : 140,800.68 = 56,719.04 : x
  2. Step 2: Convert to fraction form
    102,040.70/140,800.68 = 56,719.04/x
  3. Step 3: Cross multiply
    102,040.70x = 140,800.68 × 56,719.04
  4. Step 4: Simplify right side
    102,040.70x = 7,986,078,696.94
  5. Step 5: Solve for x
    x = 7,986,078,696.94/102,040.70
  6. Step 6: Final answer
    x = 78,263.66

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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.