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Finding the Fourth Proportional to 116,787.71, 161,156.46 and 65,808.74

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Solution

The fourth proportional to 116,787.71, 161,156.46 and 65,808.74 is: 90,810.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,787.71 : 161,156.46 = 65,808.74 : x
  2. Step 2: Convert to fraction form
    116,787.71/161,156.46 = 65,808.74/x
  3. Step 3: Cross multiply
    116,787.71x = 161,156.46 × 65,808.74
  4. Step 4: Simplify right side
    116,787.71x = 10,605,502,769.68
  5. Step 5: Solve for x
    x = 10,605,502,769.68/116,787.71
  6. Step 6: Final answer
    x = 90,810.10

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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.