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Finding the Fourth Proportional to 138,686.51, 208,013.63 and 37,479.77

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Solution

The fourth proportional to 138,686.51, 208,013.63 and 37,479.77 is: 56,215.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,686.51 : 208,013.63 = 37,479.77 : x
  2. Step 2: Convert to fraction form
    138,686.51/208,013.63 = 37,479.77/x
  3. Step 3: Cross multiply
    138,686.51x = 208,013.63 × 37,479.77
  4. Step 4: Simplify right side
    138,686.51x = 7,796,302,561.85
  5. Step 5: Solve for x
    x = 7,796,302,561.85/138,686.51
  6. Step 6: Final answer
    x = 56,215.29

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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.