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Finding the Fourth Proportional to 161,970.72, 223,529.88 and 90,350.60

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Solution

The fourth proportional to 161,970.72, 223,529.88 and 90,350.60 is: 124,689.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,970.72 : 223,529.88 = 90,350.60 : x
  2. Step 2: Convert to fraction form
    161,970.72/223,529.88 = 90,350.60/x
  3. Step 3: Cross multiply
    161,970.72x = 223,529.88 × 90,350.60
  4. Step 4: Simplify right side
    161,970.72x = 20,196,057,658.28
  5. Step 5: Solve for x
    x = 20,196,057,658.28/161,970.72
  6. Step 6: Final answer
    x = 124,689.56

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1.5x scale

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.