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Finding the Fourth Proportional to 77,878.94, 116,816.73 and 21,717.55

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Solution

The fourth proportional to 77,878.94, 116,816.73 and 21,717.55 is: 32,575.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,878.94 : 116,816.73 = 21,717.55 : x
  2. Step 2: Convert to fraction form
    77,878.94/116,816.73 = 21,717.55/x
  3. Step 3: Cross multiply
    77,878.94x = 116,816.73 × 21,717.55
  4. Step 4: Simplify right side
    77,878.94x = 2,536,973,239.19
  5. Step 5: Solve for x
    x = 2,536,973,239.19/77,878.94
  6. Step 6: Final answer
    x = 32,575.86

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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.