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Finding the Fourth Proportional to 156,610.82, 216,123.08 and 84,990.86

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Solution

The fourth proportional to 156,610.82, 216,123.08 and 84,990.86 is: 117,287.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,610.82 : 216,123.08 = 84,990.86 : x
  2. Step 2: Convert to fraction form
    156,610.82/216,123.08 = 84,990.86/x
  3. Step 3: Cross multiply
    156,610.82x = 216,123.08 × 84,990.86
  4. Step 4: Simplify right side
    156,610.82x = 18,368,484,929.48
  5. Step 5: Solve for x
    x = 18,368,484,929.48/156,610.82
  6. Step 6: Final answer
    x = 117,287.46

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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.