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Finding the Fourth Proportional to 291,676.78, 437,515.20 and 70,060.78

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Solution

The fourth proportional to 291,676.78, 437,515.20 and 70,060.78 is: 105,091.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,676.78 : 437,515.20 = 70,060.78 : x
  2. Step 2: Convert to fraction form
    291,676.78/437,515.20 = 70,060.78/x
  3. Step 3: Cross multiply
    291,676.78x = 437,515.20 × 70,060.78
  4. Step 4: Simplify right side
    291,676.78x = 30,652,656,173.86
  5. Step 5: Solve for x
    x = 30,652,656,173.86/291,676.78
  6. Step 6: Final answer
    x = 105,091.18

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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.