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Finding the Third Proportional to 27,557 and 42,776

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Solution

The third proportional to 27,557 and 42,776 is: 66,400.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,557 : 42,776 = 42,776 : x
  2. Step 2: Convert to fraction form
    27,557/42,776 = 42,776/x
  3. Step 3: Cross multiply
    27,557x = 42,776 × 42,776
  4. Step 4: Simplify right side
    27,557x = 1,829,786,176
  5. Step 5: Solve for x
    x = 1,829,786,176/27,557
  6. Step 6: Final answer
    x = 66,400.05

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.