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Finding the Fourth Proportional to 90,490.40, 135,751.80 and 37,905.20

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Solution

The fourth proportional to 90,490.40, 135,751.80 and 37,905.20 is: 56,864.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,490.40 : 135,751.80 = 37,905.20 : x
  2. Step 2: Convert to fraction form
    90,490.40/135,751.80 = 37,905.20/x
  3. Step 3: Cross multiply
    90,490.40x = 135,751.80 × 37,905.20
  4. Step 4: Simplify right side
    90,490.40x = 5,145,699,129.36
  5. Step 5: Solve for x
    x = 5,145,699,129.36/90,490.40
  6. Step 6: Final answer
    x = 56,864.59

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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.