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Finding the Fourth Proportional to 85,300.70, 117,709.62 and 47,060.78

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Solution

The fourth proportional to 85,300.70, 117,709.62 and 47,060.78 is: 64,940.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,300.70 : 117,709.62 = 47,060.78 : x
  2. Step 2: Convert to fraction form
    85,300.70/117,709.62 = 47,060.78/x
  3. Step 3: Cross multiply
    85,300.70x = 117,709.62 × 47,060.78
  4. Step 4: Simplify right side
    85,300.70x = 5,539,506,530.70
  5. Step 5: Solve for x
    x = 5,539,506,530.70/85,300.70
  6. Step 6: Final answer
    x = 64,940.93

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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.