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Finding the Fourth Proportional to 345,561.72, 518,128.74 and 134,952

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Solution

The fourth proportional to 345,561.72, 518,128.74 and 134,952 is: 202,344.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,561.72 : 518,128.74 = 134,952 : x
  2. Step 2: Convert to fraction form
    345,561.72/518,128.74 = 134,952/x
  3. Step 3: Cross multiply
    345,561.72x = 518,128.74 × 134,952
  4. Step 4: Simplify right side
    345,561.72x = 69,922,509,720.48
  5. Step 5: Solve for x
    x = 69,922,509,720.48/345,561.72
  6. Step 6: Final answer
    x = 202,344.49

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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.