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Finding the Fourth Proportional to 90,966, 125,528.22 and 50,128.77

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Solution

The fourth proportional to 90,966, 125,528.22 and 50,128.77 is: 69,175.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,966 : 125,528.22 = 50,128.77 : x
  2. Step 2: Convert to fraction form
    90,966/125,528.22 = 50,128.77/x
  3. Step 3: Cross multiply
    90,966x = 125,528.22 × 50,128.77
  4. Step 4: Simplify right side
    90,966x = 6,292,575,268.89
  5. Step 5: Solve for x
    x = 6,292,575,268.89/90,966
  6. Step 6: Final answer
    x = 69,175.02

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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.