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Finding the Fourth Proportional to 68,985.41, 103,461.71 and 19,064.40

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Solution

The fourth proportional to 68,985.41, 103,461.71 and 19,064.40 is: 28,592.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,985.41 : 103,461.71 = 19,064.40 : x
  2. Step 2: Convert to fraction form
    68,985.41/103,461.71 = 19,064.40/x
  3. Step 3: Cross multiply
    68,985.41x = 103,461.71 × 19,064.40
  4. Step 4: Simplify right side
    68,985.41x = 1,972,434,940.82
  5. Step 5: Solve for x
    x = 1,972,434,940.82/68,985.41
  6. Step 6: Final answer
    x = 28,592.06

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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.