Home / 112,139.13-168,208.67-76,972.17

Finding the Fourth Proportional to 112,139.13, 168,208.67 and 76,972.17

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Solution

The fourth proportional to 112,139.13, 168,208.67 and 76,972.17 is: 115,458.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,139.13 : 168,208.67 = 76,972.17 : x
  2. Step 2: Convert to fraction form
    112,139.13/168,208.67 = 76,972.17/x
  3. Step 3: Cross multiply
    112,139.13x = 168,208.67 × 76,972.17
  4. Step 4: Simplify right side
    112,139.13x = 12,947,385,957.85
  5. Step 5: Solve for x
    x = 12,947,385,957.85/112,139.13
  6. Step 6: Final answer
    x = 115,458.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.