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Finding the Fourth Proportional to 156,608.71, 216,120.74 and 84,988.73

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Solution

The fourth proportional to 156,608.71, 216,120.74 and 84,988.73 is: 117,284.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,608.71 : 216,120.74 = 84,988.73 : x
  2. Step 2: Convert to fraction form
    156,608.71/216,120.74 = 84,988.73/x
  3. Step 3: Cross multiply
    156,608.71x = 216,120.74 × 84,988.73
  4. Step 4: Simplify right side
    156,608.71x = 18,367,827,334.62
  5. Step 5: Solve for x
    x = 18,367,827,334.62/156,608.71
  6. Step 6: Final answer
    x = 117,284.84

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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.