Home / 116,874.84-161,254.62-78,688.20

Finding the Fourth Proportional to 116,874.84, 161,254.62 and 78,688.20

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Solution

The fourth proportional to 116,874.84, 161,254.62 and 78,688.20 is: 108,567.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,874.84 : 161,254.62 = 78,688.20 : x
  2. Step 2: Convert to fraction form
    116,874.84/161,254.62 = 78,688.20/x
  3. Step 3: Cross multiply
    116,874.84x = 161,254.62 × 78,688.20
  4. Step 4: Simplify right side
    116,874.84x = 12,688,835,789.48
  5. Step 5: Solve for x
    x = 12,688,835,789.48/116,874.84
  6. Step 6: Final answer
    x = 108,567.73

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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.