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Finding the Fourth Proportional to 161,990.69, 242,988.20 and 56,812.73

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Solution

The fourth proportional to 161,990.69, 242,988.20 and 56,812.73 is: 85,219.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,990.69 : 242,988.20 = 56,812.73 : x
  2. Step 2: Convert to fraction form
    161,990.69/242,988.20 = 56,812.73/x
  3. Step 3: Cross multiply
    161,990.69x = 242,988.20 × 56,812.73
  4. Step 4: Simplify right side
    161,990.69x = 13,804,822,715.72
  5. Step 5: Solve for x
    x = 13,804,822,715.72/161,990.69
  6. Step 6: Final answer
    x = 85,219.85

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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.