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Finding the Fourth Proportional to 92,985.76, 128,321.16 and 50,544.28

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Solution

The fourth proportional to 92,985.76, 128,321.16 and 50,544.28 is: 69,751.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,985.76 : 128,321.16 = 50,544.28 : x
  2. Step 2: Convert to fraction form
    92,985.76/128,321.16 = 50,544.28/x
  3. Step 3: Cross multiply
    92,985.76x = 128,321.16 × 50,544.28
  4. Step 4: Simplify right side
    92,985.76x = 6,485,900,640.96
  5. Step 5: Solve for x
    x = 6,485,900,640.96/92,985.76
  6. Step 6: Final answer
    x = 69,751.55

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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.