Home / 138,815.98-208,309.64-54,561.35

Finding the Fourth Proportional to 138,815.98, 208,309.64 and 54,561.35

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Solution

The fourth proportional to 138,815.98, 208,309.64 and 54,561.35 is: 81,875.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,815.98 : 208,309.64 = 54,561.35 : x
  2. Step 2: Convert to fraction form
    138,815.98/208,309.64 = 54,561.35/x
  3. Step 3: Cross multiply
    138,815.98x = 208,309.64 × 54,561.35
  4. Step 4: Simplify right side
    138,815.98x = 11,365,655,424.38
  5. Step 5: Solve for x
    x = 11,365,655,424.38/138,815.98
  6. Step 6: Final answer
    x = 81,875.70

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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.