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Finding the Fourth Proportional to 85,968.41, 118,636.85 and 47,728.51

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Solution

The fourth proportional to 85,968.41, 118,636.85 and 47,728.51 is: 65,865.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,968.41 : 118,636.85 = 47,728.51 : x
  2. Step 2: Convert to fraction form
    85,968.41/118,636.85 = 47,728.51/x
  3. Step 3: Cross multiply
    85,968.41x = 118,636.85 × 47,728.51
  4. Step 4: Simplify right side
    85,968.41x = 5,662,359,904.32
  5. Step 5: Solve for x
    x = 5,662,359,904.32/85,968.41
  6. Step 6: Final answer
    x = 65,865.59

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1.5x scale

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.