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Finding the Third Proportional to 28,520 and 66,090

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Solution

The third proportional to 28,520 and 66,090 is: 153,151.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,520 : 66,090 = 66,090 : x
  2. Step 2: Convert to fraction form
    28,520/66,090 = 66,090/x
  3. Step 3: Cross multiply
    28,520x = 66,090 × 66,090
  4. Step 4: Simplify right side
    28,520x = 4,367,888,100
  5. Step 5: Solve for x
    x = 4,367,888,100/28,520
  6. Step 6: Final answer
    x = 153,151.76

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Why These Related Problems?

These problems maintain the same ratio (2.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.