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Finding the Fourth Proportional to 85,129.44, 117,482.26 and 47,403.70

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Solution

The fourth proportional to 85,129.44, 117,482.26 and 47,403.70 is: 65,419.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,129.44 : 117,482.26 = 47,403.70 : x
  2. Step 2: Convert to fraction form
    85,129.44/117,482.26 = 47,403.70/x
  3. Step 3: Cross multiply
    85,129.44x = 117,482.26 × 47,403.70
  4. Step 4: Simplify right side
    85,129.44x = 5,569,093,808.36
  5. Step 5: Solve for x
    x = 5,569,093,808.36/85,129.44
  6. Step 6: Final answer
    x = 65,419.13

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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.