Home / 138,909.40-208,283.64-122,302.78

Finding the Fourth Proportional to 138,909.40, 208,283.64 and 122,302.78

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Solution

The fourth proportional to 138,909.40, 208,283.64 and 122,302.78 is: 183,383.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,909.40 : 208,283.64 = 122,302.78 : x
  2. Step 2: Convert to fraction form
    138,909.40/208,283.64 = 122,302.78/x
  3. Step 3: Cross multiply
    138,909.40x = 208,283.64 × 122,302.78
  4. Step 4: Simplify right side
    138,909.40x = 25,473,668,200.52
  5. Step 5: Solve for x
    x = 25,473,668,200.52/138,909.40
  6. Step 6: Final answer
    x = 183,383.33

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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.