Home / 138,044.64-190,513.76-81,444.96

Finding the Fourth Proportional to 138,044.64, 190,513.76 and 81,444.96

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Solution

The fourth proportional to 138,044.64, 190,513.76 and 81,444.96 is: 112,401.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,044.64 : 190,513.76 = 81,444.96 : x
  2. Step 2: Convert to fraction form
    138,044.64/190,513.76 = 81,444.96/x
  3. Step 3: Cross multiply
    138,044.64x = 190,513.76 × 81,444.96
  4. Step 4: Simplify right side
    138,044.64x = 15,516,385,562.65
  5. Step 5: Solve for x
    x = 15,516,385,562.65/138,044.64
  6. Step 6: Final answer
    x = 112,401.22

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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.