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Finding the Third Proportional to 118,987.50 and 258,711

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Solution

The third proportional to 118,987.50 and 258,711 is: 562,507.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,987.50 : 258,711 = 258,711 : x
  2. Step 2: Convert to fraction form
    118,987.50/258,711 = 258,711/x
  3. Step 3: Cross multiply
    118,987.50x = 258,711 × 258,711
  4. Step 4: Simplify right side
    118,987.50x = 66,931,381,521
  5. Step 5: Solve for x
    x = 66,931,381,521/118,987.50
  6. Step 6: Final answer
    x = 562,507.67

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.