Home / 129,639.44-178,834.12-89,283.28

Finding the Fourth Proportional to 129,639.44, 178,834.12 and 89,283.28

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Solution

The fourth proportional to 129,639.44, 178,834.12 and 89,283.28 is: 123,163.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,639.44 : 178,834.12 = 89,283.28 : x
  2. Step 2: Convert to fraction form
    129,639.44/178,834.12 = 89,283.28/x
  3. Step 3: Cross multiply
    129,639.44x = 178,834.12 × 89,283.28
  4. Step 4: Simplify right side
    129,639.44x = 15,966,896,809.51
  5. Step 5: Solve for x
    x = 15,966,896,809.51/129,639.44
  6. Step 6: Final answer
    x = 123,163.88

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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.