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Finding the Fourth Proportional to 138,803.80, 208,174.50 and 63,851.98

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Solution

The fourth proportional to 138,803.80, 208,174.50 and 63,851.98 is: 95,763.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,803.80 : 208,174.50 = 63,851.98 : x
  2. Step 2: Convert to fraction form
    138,803.80/208,174.50 = 63,851.98/x
  3. Step 3: Cross multiply
    138,803.80x = 208,174.50 × 63,851.98
  4. Step 4: Simplify right side
    138,803.80x = 13,292,354,010.51
  5. Step 5: Solve for x
    x = 13,292,354,010.51/138,803.80
  6. Step 6: Final answer
    x = 95,763.62

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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.