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Finding the Fourth Proportional to 161,640.48, 223,070.78 and 90,020.50

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Solution

The fourth proportional to 161,640.48, 223,070.78 and 90,020.50 is: 124,232.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,640.48 : 223,070.78 = 90,020.50 : x
  2. Step 2: Convert to fraction form
    161,640.48/223,070.78 = 90,020.50/x
  3. Step 3: Cross multiply
    161,640.48x = 223,070.78 × 90,020.50
  4. Step 4: Simplify right side
    161,640.48x = 20,080,942,700.89
  5. Step 5: Solve for x
    x = 20,080,942,700.89/161,640.48
  6. Step 6: Final answer
    x = 124,232.14

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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.