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Finding the Fourth Proportional to 78,780.56, 118,170.68 and 23,376.56

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Solution

The fourth proportional to 78,780.56, 118,170.68 and 23,376.56 is: 35,064.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,780.56 : 118,170.68 = 23,376.56 : x
  2. Step 2: Convert to fraction form
    78,780.56/118,170.68 = 23,376.56/x
  3. Step 3: Cross multiply
    78,780.56x = 118,170.68 × 23,376.56
  4. Step 4: Simplify right side
    78,780.56x = 2,762,423,991.26
  5. Step 5: Solve for x
    x = 2,762,423,991.26/78,780.56
  6. Step 6: Final answer
    x = 35,064.79

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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.