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Finding the Third Proportional to 51,421.50 and 77,680.13

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Solution

The third proportional to 51,421.50 and 77,680.13 is: 117,347.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,421.50 : 77,680.13 = 77,680.13 : x
  2. Step 2: Convert to fraction form
    51,421.50/77,680.13 = 77,680.13/x
  3. Step 3: Cross multiply
    51,421.50x = 77,680.13 × 77,680.13
  4. Step 4: Simplify right side
    51,421.50x = 6,034,201,820.02
  5. Step 5: Solve for x
    x = 6,034,201,820.02/51,421.50
  6. Step 6: Final answer
    x = 117,347.84

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.