Home / 138,606.57-191,276.81-78,177.03

Finding the Fourth Proportional to 138,606.57, 191,276.81 and 78,177.03

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Solution

The fourth proportional to 138,606.57, 191,276.81 and 78,177.03 is: 107,884.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,606.57 : 191,276.81 = 78,177.03 : x
  2. Step 2: Convert to fraction form
    138,606.57/191,276.81 = 78,177.03/x
  3. Step 3: Cross multiply
    138,606.57x = 191,276.81 × 78,177.03
  4. Step 4: Simplify right side
    138,606.57x = 14,953,452,522.79
  5. Step 5: Solve for x
    x = 14,953,452,522.79/138,606.57
  6. Step 6: Final answer
    x = 107,884.15

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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.