Home / 138,985.60-208,580.80-55,939.20

Finding the Fourth Proportional to 138,985.60, 208,580.80 and 55,939.20

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Solution

The fourth proportional to 138,985.60, 208,580.80 and 55,939.20 is: 83,950.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,985.60 : 208,580.80 = 55,939.20 : x
  2. Step 2: Convert to fraction form
    138,985.60/208,580.80 = 55,939.20/x
  3. Step 3: Cross multiply
    138,985.60x = 208,580.80 × 55,939.20
  4. Step 4: Simplify right side
    138,985.60x = 11,667,843,087.36
  5. Step 5: Solve for x
    x = 11,667,843,087.36/138,985.60
  6. Step 6: Final answer
    x = 83,950.01

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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.