Home / 138,811.85-208,303.43-54,557.21

Finding the Fourth Proportional to 138,811.85, 208,303.43 and 54,557.21

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Solution

The fourth proportional to 138,811.85, 208,303.43 and 54,557.21 is: 81,869.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,811.85 : 208,303.43 = 54,557.21 : x
  2. Step 2: Convert to fraction form
    138,811.85/208,303.43 = 54,557.21/x
  3. Step 3: Cross multiply
    138,811.85x = 208,303.43 × 54,557.21
  4. Step 4: Simplify right side
    138,811.85x = 11,364,452,659.93
  5. Step 5: Solve for x
    x = 11,364,452,659.93/138,811.85
  6. Step 6: Final answer
    x = 81,869.47

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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.