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Finding the Fourth Proportional to 163,638.78, 225,838.62 and 100,018.98

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Solution

The fourth proportional to 163,638.78, 225,838.62 and 100,018.98 is: 138,036.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,638.78 : 225,838.62 = 100,018.98 : x
  2. Step 2: Convert to fraction form
    163,638.78/225,838.62 = 100,018.98/x
  3. Step 3: Cross multiply
    163,638.78x = 225,838.62 × 100,018.98
  4. Step 4: Simplify right side
    163,638.78x = 22,588,148,417.01
  5. Step 5: Solve for x
    x = 22,588,148,417.01/163,638.78
  6. Step 6: Final answer
    x = 138,036.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.