Home / 100,681.58-138,937.65-55,359.52

Finding the Fourth Proportional to 100,681.58, 138,937.65 and 55,359.52

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Solution

The fourth proportional to 100,681.58, 138,937.65 and 55,359.52 is: 76,394.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,681.58 : 138,937.65 = 55,359.52 : x
  2. Step 2: Convert to fraction form
    100,681.58/138,937.65 = 55,359.52/x
  3. Step 3: Cross multiply
    100,681.58x = 138,937.65 × 55,359.52
  4. Step 4: Simplify right side
    100,681.58x = 7,691,521,058.99
  5. Step 5: Solve for x
    x = 7,691,521,058.99/100,681.58
  6. Step 6: Final answer
    x = 76,394.52

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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.