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Finding the Third Proportional to 52,618 and 78,987

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Solution

The third proportional to 52,618 and 78,987 is: 118,570.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,618 : 78,987 = 78,987 : x
  2. Step 2: Convert to fraction form
    52,618/78,987 = 78,987/x
  3. Step 3: Cross multiply
    52,618x = 78,987 × 78,987
  4. Step 4: Simplify right side
    52,618x = 6,238,946,169
  5. Step 5: Solve for x
    x = 6,238,946,169/52,618
  6. Step 6: Final answer
    x = 118,570.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.