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Finding the Fourth Proportional to 117,212,472, 161,753,212.80 and 65,704,248

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Solution

The fourth proportional to 117,212,472, 161,753,212.80 and 65,704,248 is: 90,671,863.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,212,472 : 161,753,212.80 = 65,704,248 : x
  2. Step 2: Convert to fraction form
    117,212,472/161,753,212.80 = 65,704,248/x
  3. Step 3: Cross multiply
    117,212,472x = 161,753,212.80 × 65,704,248
  4. Step 4: Simplify right side
    117,212,472x = 10,627,873,208,607,976
  5. Step 5: Solve for x
    x = 10,627,873,208,607,976/117,212,472
  6. Step 6: Final answer
    x = 90,671,863.05

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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.