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Finding the Fourth Proportional to 161,887.79, 242,901.89 and 86,920.40

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Solution

The fourth proportional to 161,887.79, 242,901.89 and 86,920.40 is: 130,418.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,887.79 : 242,901.89 = 86,920.40 : x
  2. Step 2: Convert to fraction form
    161,887.79/242,901.89 = 86,920.40/x
  3. Step 3: Cross multiply
    161,887.79x = 242,901.89 × 86,920.40
  4. Step 4: Simplify right side
    161,887.79x = 21,113,129,439.56
  5. Step 5: Solve for x
    x = 21,113,129,439.56/161,887.79
  6. Step 6: Final answer
    x = 130,418.29

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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.