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Finding the Fourth Proportional to 212,715.62, 319,197.46 and 79,689.32

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Solution

The fourth proportional to 212,715.62, 319,197.46 and 79,689.32 is: 119,580.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,715.62 : 319,197.46 = 79,689.32 : x
  2. Step 2: Convert to fraction form
    212,715.62/319,197.46 = 79,689.32/x
  3. Step 3: Cross multiply
    212,715.62x = 319,197.46 × 79,689.32
  4. Step 4: Simplify right side
    212,715.62x = 25,436,628,533.13
  5. Step 5: Solve for x
    x = 25,436,628,533.13/212,715.62
  6. Step 6: Final answer
    x = 119,580.45

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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.