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Finding the Fourth Proportional to 73,978.07, 110,894.40 and 28,966.41

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Solution

The fourth proportional to 73,978.07, 110,894.40 and 28,966.41 is: 43,421.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,978.07 : 110,894.40 = 28,966.41 : x
  2. Step 2: Convert to fraction form
    73,978.07/110,894.40 = 28,966.41/x
  3. Step 3: Cross multiply
    73,978.07x = 110,894.40 × 28,966.41
  4. Step 4: Simplify right side
    73,978.07x = 3,212,212,657.10
  5. Step 5: Solve for x
    x = 3,212,212,657.10/73,978.07
  6. Step 6: Final answer
    x = 43,421.15

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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.