Home / 138,380.51-190,876.53-87,303.13

Finding the Fourth Proportional to 138,380.51, 190,876.53 and 87,303.13

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Solution

The fourth proportional to 138,380.51, 190,876.53 and 87,303.13 is: 120,422.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,380.51 : 190,876.53 = 87,303.13 : x
  2. Step 2: Convert to fraction form
    138,380.51/190,876.53 = 87,303.13/x
  3. Step 3: Cross multiply
    138,380.51x = 190,876.53 × 87,303.13
  4. Step 4: Simplify right side
    138,380.51x = 16,664,118,362.73
  5. Step 5: Solve for x
    x = 16,664,118,362.73/138,380.51
  6. Step 6: Final answer
    x = 120,422.44

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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.