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Finding the Fourth Proportional to 168,012.68, 251,931.50 and 79,242.34

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Solution

The fourth proportional to 168,012.68, 251,931.50 and 79,242.34 is: 118,822.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,012.68 : 251,931.50 = 79,242.34 : x
  2. Step 2: Convert to fraction form
    168,012.68/251,931.50 = 79,242.34/x
  3. Step 3: Cross multiply
    168,012.68x = 251,931.50 × 79,242.34
  4. Step 4: Simplify right side
    168,012.68x = 19,963,641,579.71
  5. Step 5: Solve for x
    x = 19,963,641,579.71/168,012.68
  6. Step 6: Final answer
    x = 118,822.23

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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.