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Finding the Fourth Proportional to 207,128.07, 310,593.93 and 72,145.07

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Solution

The fourth proportional to 207,128.07, 310,593.93 and 72,145.07 is: 108,183.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,128.07 : 310,593.93 = 72,145.07 : x
  2. Step 2: Convert to fraction form
    207,128.07/310,593.93 = 72,145.07/x
  3. Step 3: Cross multiply
    207,128.07x = 310,593.93 × 72,145.07
  4. Step 4: Simplify right side
    207,128.07x = 22,407,819,268.46
  5. Step 5: Solve for x
    x = 22,407,819,268.46/207,128.07
  6. Step 6: Final answer
    x = 108,183.40

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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.