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Finding the Fourth Proportional to 161,781.80, 242,672.70 and 56,611.40

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Solution

The fourth proportional to 161,781.80, 242,672.70 and 56,611.40 is: 84,917.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,781.80 : 242,672.70 = 56,611.40 : x
  2. Step 2: Convert to fraction form
    161,781.80/242,672.70 = 56,611.40/x
  3. Step 3: Cross multiply
    161,781.80x = 242,672.70 × 56,611.40
  4. Step 4: Simplify right side
    161,781.80x = 13,738,041,288.78
  5. Step 5: Solve for x
    x = 13,738,041,288.78/161,781.80
  6. Step 6: Final answer
    x = 84,917.10

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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.