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Finding the Fourth Proportional to 315,750.87, 435,742.47 and 172,519.79

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Solution

The fourth proportional to 315,750.87, 435,742.47 and 172,519.79 is: 238,080.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,750.87 : 435,742.47 = 172,519.79 : x
  2. Step 2: Convert to fraction form
    315,750.87/435,742.47 = 172,519.79/x
  3. Step 3: Cross multiply
    315,750.87x = 435,742.47 × 172,519.79
  4. Step 4: Simplify right side
    315,750.87x = 75,174,197,239.77
  5. Step 5: Solve for x
    x = 75,174,197,239.77/315,750.87
  6. Step 6: Final answer
    x = 238,080.73

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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.