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Finding the Fourth Proportional to 118,490.31, 163,531.98 and 67,521.47

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Solution

The fourth proportional to 118,490.31, 163,531.98 and 67,521.47 is: 93,188.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,490.31 : 163,531.98 = 67,521.47 : x
  2. Step 2: Convert to fraction form
    118,490.31/163,531.98 = 67,521.47/x
  3. Step 3: Cross multiply
    118,490.31x = 163,531.98 × 67,521.47
  4. Step 4: Simplify right side
    118,490.31x = 11,041,918,863.95
  5. Step 5: Solve for x
    x = 11,041,918,863.95/118,490.31
  6. Step 6: Final answer
    x = 93,188.37

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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.