Home / 129,705.13-178,995.81-73,116.50

Finding the Fourth Proportional to 129,705.13, 178,995.81 and 73,116.50

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Solution

The fourth proportional to 129,705.13, 178,995.81 and 73,116.50 is: 100,902.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,705.13 : 178,995.81 = 73,116.50 : x
  2. Step 2: Convert to fraction form
    129,705.13/178,995.81 = 73,116.50/x
  3. Step 3: Cross multiply
    129,705.13x = 178,995.81 × 73,116.50
  4. Step 4: Simplify right side
    129,705.13x = 13,087,547,141.87
  5. Step 5: Solve for x
    x = 13,087,547,141.87/129,705.13
  6. Step 6: Final answer
    x = 100,902.31

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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.