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Finding the Fourth Proportional to 85,412.18, 117,865.04 and 47,685.62

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Solution

The fourth proportional to 85,412.18, 117,865.04 and 47,685.62 is: 65,804.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,412.18 : 117,865.04 = 47,685.62 : x
  2. Step 2: Convert to fraction form
    85,412.18/117,865.04 = 47,685.62/x
  3. Step 3: Cross multiply
    85,412.18x = 117,865.04 × 47,685.62
  4. Step 4: Simplify right side
    85,412.18x = 5,620,467,508.72
  5. Step 5: Solve for x
    x = 5,620,467,508.72/85,412.18
  6. Step 6: Final answer
    x = 65,804.05

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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.