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Finding the Fourth Proportional to 279,570.16, 419,368.20 and 79,918.93

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Solution

The fourth proportional to 279,570.16, 419,368.20 and 79,918.93 is: 119,882.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,570.16 : 419,368.20 = 79,918.93 : x
  2. Step 2: Convert to fraction form
    279,570.16/419,368.20 = 79,918.93/x
  3. Step 3: Cross multiply
    279,570.16x = 419,368.20 × 79,918.93
  4. Step 4: Simplify right side
    279,570.16x = 33,515,457,820.03
  5. Step 5: Solve for x
    x = 33,515,457,820.03/279,570.16
  6. Step 6: Final answer
    x = 119,882.10

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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.