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Finding the Fourth Proportional to 78,877.84, 118,317.06 and 19,713.57

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Solution

The fourth proportional to 78,877.84, 118,317.06 and 19,713.57 is: 29,570.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,877.84 : 118,317.06 = 19,713.57 : x
  2. Step 2: Convert to fraction form
    78,877.84/118,317.06 = 19,713.57/x
  3. Step 3: Cross multiply
    78,877.84x = 118,317.06 × 19,713.57
  4. Step 4: Simplify right side
    78,877.84x = 2,332,451,644.50
  5. Step 5: Solve for x
    x = 2,332,451,644.50/78,877.84
  6. Step 6: Final answer
    x = 29,570.43

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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.