Home / 156,911.80-216,587.82-100,323.40

Finding the Fourth Proportional to 156,911.80, 216,587.82 and 100,323.40

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Solution

The fourth proportional to 156,911.80, 216,587.82 and 100,323.40 is: 138,477.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,911.80 : 216,587.82 = 100,323.40 : x
  2. Step 2: Convert to fraction form
    156,911.80/216,587.82 = 100,323.40/x
  3. Step 3: Cross multiply
    156,911.80x = 216,587.82 × 100,323.40
  4. Step 4: Simplify right side
    156,911.80x = 21,728,826,500.99
  5. Step 5: Solve for x
    x = 21,728,826,500.99/156,911.80
  6. Step 6: Final answer
    x = 138,477.96

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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.