Home / 129,061.01-178,031.99-81,231.32

Finding the Fourth Proportional to 129,061.01, 178,031.99 and 81,231.32

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Solution

The fourth proportional to 129,061.01, 178,031.99 and 81,231.32 is: 112,053.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,061.01 : 178,031.99 = 81,231.32 : x
  2. Step 2: Convert to fraction form
    129,061.01/178,031.99 = 81,231.32/x
  3. Step 3: Cross multiply
    129,061.01x = 178,031.99 × 81,231.32
  4. Step 4: Simplify right side
    129,061.01x = 14,461,774,198.09
  5. Step 5: Solve for x
    x = 14,461,774,198.09/129,061.01
  6. Step 6: Final answer
    x = 112,053.78

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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.