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Finding the Fourth Proportional to 90,146.60, 124,440.60 and 56,171.88

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Solution

The fourth proportional to 90,146.60, 124,440.60 and 56,171.88 is: 77,541.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,146.60 : 124,440.60 = 56,171.88 : x
  2. Step 2: Convert to fraction form
    90,146.60/124,440.60 = 56,171.88/x
  3. Step 3: Cross multiply
    90,146.60x = 124,440.60 × 56,171.88
  4. Step 4: Simplify right side
    90,146.60x = 6,990,062,450.33
  5. Step 5: Solve for x
    x = 6,990,062,450.33/90,146.60
  6. Step 6: Final answer
    x = 77,541.06

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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.