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Finding the Fourth Proportional to 51,568.93, 77,358.80 and 21,989.89

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Solution

The fourth proportional to 51,568.93, 77,358.80 and 21,989.89 is: 32,987.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,568.93 : 77,358.80 = 21,989.89 : x
  2. Step 2: Convert to fraction form
    51,568.93/77,358.80 = 21,989.89/x
  3. Step 3: Cross multiply
    51,568.93x = 77,358.80 × 21,989.89
  4. Step 4: Simplify right side
    51,568.93x = 1,701,111,502.53
  5. Step 5: Solve for x
    x = 1,701,111,502.53/51,568.93
  6. Step 6: Final answer
    x = 32,987.14

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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.