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Finding the Fourth Proportional to 92,978.04, 128,321.33 and 52,704.84

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Solution

The fourth proportional to 92,978.04, 128,321.33 and 52,704.84 is: 72,739.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,978.04 : 128,321.33 = 52,704.84 : x
  2. Step 2: Convert to fraction form
    92,978.04/128,321.33 = 52,704.84/x
  3. Step 3: Cross multiply
    92,978.04x = 128,321.33 × 52,704.84
  4. Step 4: Simplify right side
    92,978.04x = 6,763,155,166.24
  5. Step 5: Solve for x
    x = 6,763,155,166.24/92,978.04
  6. Step 6: Final answer
    x = 72,739.27

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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.