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Finding the Fourth Proportional to 138,625.69, 208,030.80 and 75,461.74

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Solution

The fourth proportional to 138,625.69, 208,030.80 and 75,461.74 is: 113,242.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,625.69 : 208,030.80 = 75,461.74 : x
  2. Step 2: Convert to fraction form
    138,625.69/208,030.80 = 75,461.74/x
  3. Step 3: Cross multiply
    138,625.69x = 208,030.80 × 75,461.74
  4. Step 4: Simplify right side
    138,625.69x = 15,698,366,141.59
  5. Step 5: Solve for x
    x = 15,698,366,141.59/138,625.69
  6. Step 6: Final answer
    x = 113,242.84

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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.