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Finding the Fourth Proportional to 212,980.68, 319,526.60 and 79,863.45

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Solution

The fourth proportional to 212,980.68, 319,526.60 and 79,863.45 is: 119,816.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,980.68 : 319,526.60 = 79,863.45 : x
  2. Step 2: Convert to fraction form
    212,980.68/319,526.60 = 79,863.45/x
  3. Step 3: Cross multiply
    212,980.68x = 319,526.60 × 79,863.45
  4. Step 4: Simplify right side
    212,980.68x = 25,518,496,243.45
  5. Step 5: Solve for x
    x = 25,518,496,243.45/212,980.68
  6. Step 6: Final answer
    x = 119,816.01

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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.