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Finding the Fourth Proportional to 84,860, 117,106.80 and 47,137.76

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Solution

The fourth proportional to 84,860, 117,106.80 and 47,137.76 is: 65,050.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,860 : 117,106.80 = 47,137.76 : x
  2. Step 2: Convert to fraction form
    84,860/117,106.80 = 47,137.76/x
  3. Step 3: Cross multiply
    84,860x = 117,106.80 × 47,137.76
  4. Step 4: Simplify right side
    84,860x = 5,520,152,232.77
  5. Step 5: Solve for x
    x = 5,520,152,232.77/84,860
  6. Step 6: Final answer
    x = 65,050.11

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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.