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Finding the Fourth Proportional to 85,659.80, 118,209.50 and 47,934.36

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Solution

The fourth proportional to 85,659.80, 118,209.50 and 47,934.36 is: 66,148.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,659.80 : 118,209.50 = 47,934.36 : x
  2. Step 2: Convert to fraction form
    85,659.80/118,209.50 = 47,934.36/x
  3. Step 3: Cross multiply
    85,659.80x = 118,209.50 × 47,934.36
  4. Step 4: Simplify right side
    85,659.80x = 5,666,296,728.42
  5. Step 5: Solve for x
    x = 5,666,296,728.42/85,659.80
  6. Step 6: Final answer
    x = 66,148.84

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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.