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Finding the Fourth Proportional to 90,043.62, 135,060.56 and 45,669.22

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Solution

The fourth proportional to 90,043.62, 135,060.56 and 45,669.22 is: 68,501.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,043.62 : 135,060.56 = 45,669.22 : x
  2. Step 2: Convert to fraction form
    90,043.62/135,060.56 = 45,669.22/x
  3. Step 3: Cross multiply
    90,043.62x = 135,060.56 × 45,669.22
  4. Step 4: Simplify right side
    90,043.62x = 6,168,111,049.83
  5. Step 5: Solve for x
    x = 6,168,111,049.83/90,043.62
  6. Step 6: Final answer
    x = 68,501.37

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1.5x scale

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.