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Finding the Fourth Proportional to 315,751.05, 435,731.36 and 172,508.02

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Solution

The fourth proportional to 315,751.05, 435,731.36 and 172,508.02 is: 238,058.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,751.05 : 435,731.36 = 172,508.02 : x
  2. Step 2: Convert to fraction form
    315,751.05/435,731.36 = 172,508.02/x
  3. Step 3: Cross multiply
    315,751.05x = 435,731.36 × 172,508.02
  4. Step 4: Simplify right side
    315,751.05x = 75,167,154,165.51
  5. Step 5: Solve for x
    x = 75,167,154,165.51/315,751.05
  6. Step 6: Final answer
    x = 238,058.29

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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.