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Finding the Fourth Proportional to 161,876.94, 242,885.51 and 86,909.62

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Solution

The fourth proportional to 161,876.94, 242,885.51 and 86,909.62 is: 130,402.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,876.94 : 242,885.51 = 86,909.62 : x
  2. Step 2: Convert to fraction form
    161,876.94/242,885.51 = 86,909.62/x
  3. Step 3: Cross multiply
    161,876.94x = 242,885.51 × 86,909.62
  4. Step 4: Simplify right side
    161,876.94x = 21,109,087,377.61
  5. Step 5: Solve for x
    x = 21,109,087,377.61/161,876.94
  6. Step 6: Final answer
    x = 130,402.07

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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.