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Finding the Fourth Proportional to 90,753.21, 136,118.88 and 31,583.93

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Solution

The fourth proportional to 90,753.21, 136,118.88 and 31,583.93 is: 47,372.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,753.21 : 136,118.88 = 31,583.93 : x
  2. Step 2: Convert to fraction form
    90,753.21/136,118.88 = 31,583.93/x
  3. Step 3: Cross multiply
    90,753.21x = 136,118.88 × 31,583.93
  4. Step 4: Simplify right side
    90,753.21x = 4,299,168,497.00
  5. Step 5: Solve for x
    x = 4,299,168,497.00/90,753.21
  6. Step 6: Final answer
    x = 47,372.08

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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.