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Finding the Fourth Proportional to 45,987.89, 68,981.66 and 12,707.89

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Solution

The fourth proportional to 45,987.89, 68,981.66 and 12,707.89 is: 19,061.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,987.89 : 68,981.66 = 12,707.89 : x
  2. Step 2: Convert to fraction form
    45,987.89/68,981.66 = 12,707.89/x
  3. Step 3: Cross multiply
    45,987.89x = 68,981.66 × 12,707.89
  4. Step 4: Simplify right side
    45,987.89x = 876,611,158.96
  5. Step 5: Solve for x
    x = 876,611,158.96/45,987.89
  6. Step 6: Final answer
    x = 19,061.78

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1.5x scale

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.