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Finding the Fourth Proportional to 112,538.61, 168,808.08 and 45,978.80

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Solution

The fourth proportional to 112,538.61, 168,808.08 and 45,978.80 is: 68,968.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,538.61 : 168,808.08 = 45,978.80 : x
  2. Step 2: Convert to fraction form
    112,538.61/168,808.08 = 45,978.80/x
  3. Step 3: Cross multiply
    112,538.61x = 168,808.08 × 45,978.80
  4. Step 4: Simplify right side
    112,538.61x = 7,761,591,874.77
  5. Step 5: Solve for x
    x = 7,761,591,874.77/112,538.61
  6. Step 6: Final answer
    x = 68,968.26

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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.