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Finding the Fourth Proportional to 156,618.62, 216,133.80 and 84,998.61

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Solution

The fourth proportional to 156,618.62, 216,133.80 and 84,998.61 is: 117,298.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,618.62 : 216,133.80 = 84,998.61 : x
  2. Step 2: Convert to fraction form
    156,618.62/216,133.80 = 84,998.61/x
  3. Step 3: Cross multiply
    156,618.62x = 216,133.80 × 84,998.61
  4. Step 4: Simplify right side
    156,618.62x = 18,371,072,574.02
  5. Step 5: Solve for x
    x = 18,371,072,574.02/156,618.62
  6. Step 6: Final answer
    x = 117,298.14

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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.