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Finding the Fourth Proportional to 103,361.70, 155,042.55 and 101,979.30

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Solution

The fourth proportional to 103,361.70, 155,042.55 and 101,979.30 is: 152,968.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,361.70 : 155,042.55 = 101,979.30 : x
  2. Step 2: Convert to fraction form
    103,361.70/155,042.55 = 101,979.30/x
  3. Step 3: Cross multiply
    103,361.70x = 155,042.55 × 101,979.30
  4. Step 4: Simplify right side
    103,361.70x = 15,811,130,719.22
  5. Step 5: Solve for x
    x = 15,811,130,719.22/103,361.70
  6. Step 6: Final answer
    x = 152,968.95

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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.