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Finding the Fourth Proportional to 156,621, 216,056.13 and 99,163.02

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Solution

The fourth proportional to 156,621, 216,056.13 and 99,163.02 is: 136,793.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,621 : 216,056.13 = 99,163.02 : x
  2. Step 2: Convert to fraction form
    156,621/216,056.13 = 99,163.02/x
  3. Step 3: Cross multiply
    156,621x = 216,056.13 × 99,163.02
  4. Step 4: Simplify right side
    156,621x = 21,424,778,340.31
  5. Step 5: Solve for x
    x = 21,424,778,340.31/156,621
  6. Step 6: Final answer
    x = 136,793.78

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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.