Home / 136,985.74-189,098.53-83,287.91

Finding the Fourth Proportional to 136,985.74, 189,098.53 and 83,287.91

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Solution

The fourth proportional to 136,985.74, 189,098.53 and 83,287.91 is: 114,972.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,985.74 : 189,098.53 = 83,287.91 : x
  2. Step 2: Convert to fraction form
    136,985.74/189,098.53 = 83,287.91/x
  3. Step 3: Cross multiply
    136,985.74x = 189,098.53 × 83,287.91
  4. Step 4: Simplify right side
    136,985.74x = 15,749,621,612.30
  5. Step 5: Solve for x
    x = 15,749,621,612.30/136,985.74
  6. Step 6: Final answer
    x = 114,972.71

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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.