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Finding the Fourth Proportional to 161,803.45, 223,289.80 and 90,188.01

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Solution

The fourth proportional to 161,803.45, 223,289.80 and 90,188.01 is: 124,460.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,803.45 : 223,289.80 = 90,188.01 : x
  2. Step 2: Convert to fraction form
    161,803.45/223,289.80 = 90,188.01/x
  3. Step 3: Cross multiply
    161,803.45x = 223,289.80 × 90,188.01
  4. Step 4: Simplify right side
    161,803.45x = 20,138,062,715.30
  5. Step 5: Solve for x
    x = 20,138,062,715.30/161,803.45
  6. Step 6: Final answer
    x = 124,460.03

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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.