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Finding the Fourth Proportional to 312,696,821.48, 431,573,343.48 and 173,512,423.52

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Solution

The fourth proportional to 312,696,821.48, 431,573,343.48 and 173,512,423.52 is: 239,475,848.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,696,821.48 : 431,573,343.48 = 173,512,423.52 : x
  2. Step 2: Convert to fraction form
    312,696,821.48/431,573,343.48 = 173,512,423.52/x
  3. Step 3: Cross multiply
    312,696,821.48x = 431,573,343.48 × 173,512,423.52
  4. Step 4: Simplify right side
    312,696,821.48x = 74,883,336,753,844,192
  5. Step 5: Solve for x
    x = 74,883,336,753,844,192/312,696,821.48
  6. Step 6: Final answer
    x = 239,475,848.84

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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.