Home / 129,568.49-178,810.61-75,870.81

Finding the Fourth Proportional to 129,568.49, 178,810.61 and 75,870.81

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Solution

The fourth proportional to 129,568.49, 178,810.61 and 75,870.81 is: 104,705.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,568.49 : 178,810.61 = 75,870.81 : x
  2. Step 2: Convert to fraction form
    129,568.49/178,810.61 = 75,870.81/x
  3. Step 3: Cross multiply
    129,568.49x = 178,810.61 × 75,870.81
  4. Step 4: Simplify right side
    129,568.49x = 13,566,505,437.94
  5. Step 5: Solve for x
    x = 13,566,505,437.94/129,568.49
  6. Step 6: Final answer
    x = 104,705.29

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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.