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Finding the Fourth Proportional to 161,940.71, 223,478.52 and 90,318.89

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Solution

The fourth proportional to 161,940.71, 223,478.52 and 90,318.89 is: 124,640.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,940.71 : 223,478.52 = 90,318.89 : x
  2. Step 2: Convert to fraction form
    161,940.71/223,478.52 = 90,318.89/x
  3. Step 3: Cross multiply
    161,940.71x = 223,478.52 × 90,318.89
  4. Step 4: Simplify right side
    161,940.71x = 20,184,331,865.24
  5. Step 5: Solve for x
    x = 20,184,331,865.24/161,940.71
  6. Step 6: Final answer
    x = 124,640.26

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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.