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Finding the Fourth Proportional to 78,690.76, 118,018.14 and 22,529.80

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Solution

The fourth proportional to 78,690.76, 118,018.14 and 22,529.80 is: 33,789.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,690.76 : 118,018.14 = 22,529.80 : x
  2. Step 2: Convert to fraction form
    78,690.76/118,018.14 = 22,529.80/x
  3. Step 3: Cross multiply
    78,690.76x = 118,018.14 × 22,529.80
  4. Step 4: Simplify right side
    78,690.76x = 2,658,925,090.57
  5. Step 5: Solve for x
    x = 2,658,925,090.57/78,690.76
  6. Step 6: Final answer
    x = 33,789.55

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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.