Home / 156,905.80-216,579.54-100,317.40

Finding the Fourth Proportional to 156,905.80, 216,579.54 and 100,317.40

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Solution

The fourth proportional to 156,905.80, 216,579.54 and 100,317.40 is: 138,469.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,905.80 : 216,579.54 = 100,317.40 : x
  2. Step 2: Convert to fraction form
    156,905.80/216,579.54 = 100,317.40/x
  3. Step 3: Cross multiply
    156,905.80x = 216,579.54 × 100,317.40
  4. Step 4: Simplify right side
    156,905.80x = 21,726,696,346.00
  5. Step 5: Solve for x
    x = 21,726,696,346.00/156,905.80
  6. Step 6: Final answer
    x = 138,469.68

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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.