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Finding the Fourth Proportional to 68,953.47, 103,417.78 and 19,021.18

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Solution

The fourth proportional to 68,953.47, 103,417.78 and 19,021.18 is: 28,528.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,953.47 : 103,417.78 = 19,021.18 : x
  2. Step 2: Convert to fraction form
    68,953.47/103,417.78 = 19,021.18/x
  3. Step 3: Cross multiply
    68,953.47x = 103,417.78 × 19,021.18
  4. Step 4: Simplify right side
    68,953.47x = 1,967,128,208.58
  5. Step 5: Solve for x
    x = 1,967,128,208.58/68,953.47
  6. Step 6: Final answer
    x = 28,528.34

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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.