Home / 129,543-178,769.88-72,955.32

Finding the Fourth Proportional to 129,543, 178,769.88 and 72,955.32

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Solution

The fourth proportional to 129,543, 178,769.88 and 72,955.32 is: 100,678.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,543 : 178,769.88 = 72,955.32 : x
  2. Step 2: Convert to fraction form
    129,543/178,769.88 = 72,955.32/x
  3. Step 3: Cross multiply
    129,543x = 178,769.88 × 72,955.32
  4. Step 4: Simplify right side
    129,543x = 13,042,213,801.76
  5. Step 5: Solve for x
    x = 13,042,213,801.76/129,543
  6. Step 6: Final answer
    x = 100,678.65

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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.