Home / 131,131.28-180,864.29-90,308.36

Finding the Fourth Proportional to 131,131.28, 180,864.29 and 90,308.36

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Solution

The fourth proportional to 131,131.28, 180,864.29 and 90,308.36 is: 124,558.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,131.28 : 180,864.29 = 90,308.36 : x
  2. Step 2: Convert to fraction form
    131,131.28/180,864.29 = 90,308.36/x
  3. Step 3: Cross multiply
    131,131.28x = 180,864.29 × 90,308.36
  4. Step 4: Simplify right side
    131,131.28x = 16,333,558,090.40
  5. Step 5: Solve for x
    x = 16,333,558,090.40/131,131.28
  6. Step 6: Final answer
    x = 124,558.83

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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.