Home / 138,743.35-208,030.75-54,402.47

Finding the Fourth Proportional to 138,743.35, 208,030.75 and 54,402.47

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Solution

The fourth proportional to 138,743.35, 208,030.75 and 54,402.47 is: 81,570.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,743.35 : 208,030.75 = 54,402.47 : x
  2. Step 2: Convert to fraction form
    138,743.35/208,030.75 = 54,402.47/x
  3. Step 3: Cross multiply
    138,743.35x = 208,030.75 × 54,402.47
  4. Step 4: Simplify right side
    138,743.35x = 11,317,385,595.80
  5. Step 5: Solve for x
    x = 11,317,385,595.80/138,743.35
  6. Step 6: Final answer
    x = 81,570.65

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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.