Home / 129,048.75-178,010.06-81,219.06

Finding the Fourth Proportional to 129,048.75, 178,010.06 and 81,219.06

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Solution

The fourth proportional to 129,048.75, 178,010.06 and 81,219.06 is: 112,033.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,048.75 : 178,010.06 = 81,219.06 : x
  2. Step 2: Convert to fraction form
    129,048.75/178,010.06 = 81,219.06/x
  3. Step 3: Cross multiply
    129,048.75x = 178,010.06 × 81,219.06
  4. Step 4: Simplify right side
    129,048.75x = 14,457,809,337.65
  5. Step 5: Solve for x
    x = 14,457,809,337.65/129,048.75
  6. Step 6: Final answer
    x = 112,033.70

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1.5x scale

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.