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Finding the Fourth Proportional to 315,368.07, 435,204.79 and 172,126.86

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Solution

The fourth proportional to 315,368.07, 435,204.79 and 172,126.86 is: 237,533.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,368.07 : 435,204.79 = 172,126.86 : x
  2. Step 2: Convert to fraction form
    315,368.07/435,204.79 = 172,126.86/x
  3. Step 3: Cross multiply
    315,368.07x = 435,204.79 × 172,126.86
  4. Step 4: Simplify right side
    315,368.07x = 74,910,433,959.66
  5. Step 5: Solve for x
    x = 74,910,433,959.66/315,368.07
  6. Step 6: Final answer
    x = 237,533.35

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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.