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Finding the Fourth Proportional to 212,649.53, 318,963.70 and 79,520.00

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Solution

The fourth proportional to 212,649.53, 318,963.70 and 79,520.00 is: 119,276.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,649.53 : 318,963.70 = 79,520.00 : x
  2. Step 2: Convert to fraction form
    212,649.53/318,963.70 = 79,520.00/x
  3. Step 3: Cross multiply
    212,649.53x = 318,963.70 × 79,520.00
  4. Step 4: Simplify right side
    212,649.53x = 25,363,994,396.19
  5. Step 5: Solve for x
    x = 25,363,994,396.19/212,649.53
  6. Step 6: Final answer
    x = 119,276.04

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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.