Home / 100,490.18-138,681.45-55,167.84

Finding the Fourth Proportional to 100,490.18, 138,681.45 and 55,167.84

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Solution

The fourth proportional to 100,490.18, 138,681.45 and 55,167.84 is: 76,134.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,490.18 : 138,681.45 = 55,167.84 : x
  2. Step 2: Convert to fraction form
    100,490.18/138,681.45 = 55,167.84/x
  3. Step 3: Cross multiply
    100,490.18x = 138,681.45 × 55,167.84
  4. Step 4: Simplify right side
    100,490.18x = 7,650,756,044.57
  5. Step 5: Solve for x
    x = 7,650,756,044.57/100,490.18
  6. Step 6: Final answer
    x = 76,134.37

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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.