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Finding the Fourth Proportional to 212,140.00, 317,999.80 and 99,618.80

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Solution

The fourth proportional to 212,140.00, 317,999.80 and 99,618.80 is: 149,329.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,140.00 : 317,999.80 = 99,618.80 : x
  2. Step 2: Convert to fraction form
    212,140.00/317,999.80 = 99,618.80/x
  3. Step 3: Cross multiply
    212,140.00x = 317,999.80 × 99,618.80
  4. Step 4: Simplify right side
    212,140.00x = 31,678,757,197.55
  5. Step 5: Solve for x
    x = 31,678,757,197.55/212,140.00
  6. Step 6: Final answer
    x = 149,329.49

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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.