Home / 138,989.40-208,357.74-72,351.24

Finding the Fourth Proportional to 138,989.40, 208,357.74 and 72,351.24

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Solution

The fourth proportional to 138,989.40, 208,357.74 and 72,351.24 is: 108,461.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,989.40 : 208,357.74 = 72,351.24 : x
  2. Step 2: Convert to fraction form
    138,989.40/208,357.74 = 72,351.24/x
  3. Step 3: Cross multiply
    138,989.40x = 208,357.74 × 72,351.24
  4. Step 4: Simplify right side
    138,989.40x = 15,074,940,852.60
  5. Step 5: Solve for x
    x = 15,074,940,852.60/138,989.40
  6. Step 6: Final answer
    x = 108,461.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.