Home / 138,012.48-190,321.92-87,624

Finding the Fourth Proportional to 138,012.48, 190,321.92 and 87,624

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Solution

The fourth proportional to 138,012.48, 190,321.92 and 87,624 is: 120,835.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,012.48 : 190,321.92 = 87,624 : x
  2. Step 2: Convert to fraction form
    138,012.48/190,321.92 = 87,624/x
  3. Step 3: Cross multiply
    138,012.48x = 190,321.92 × 87,624
  4. Step 4: Simplify right side
    138,012.48x = 16,676,767,918.08
  5. Step 5: Solve for x
    x = 16,676,767,918.08/138,012.48
  6. Step 6: Final answer
    x = 120,835.22

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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.