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Finding the Fourth Proportional to 315,621.16, 435,559.62 and 172,378.60

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Solution

The fourth proportional to 315,621.16, 435,559.62 and 172,378.60 is: 237,883.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,621.16 : 435,559.62 = 172,378.60 : x
  2. Step 2: Convert to fraction form
    315,621.16/435,559.62 = 172,378.60/x
  3. Step 3: Cross multiply
    315,621.16x = 435,559.62 × 172,378.60
  4. Step 4: Simplify right side
    315,621.16x = 75,081,157,512.13
  5. Step 5: Solve for x
    x = 75,081,157,512.13/315,621.16
  6. Step 6: Final answer
    x = 237,883.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.