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Finding the Fourth Proportional to 85,447.60, 117,916.90 and 47,207.08

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Solution

The fourth proportional to 85,447.60, 117,916.90 and 47,207.08 is: 65,145.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,447.60 : 117,916.90 = 47,207.08 : x
  2. Step 2: Convert to fraction form
    85,447.60/117,916.90 = 47,207.08/x
  3. Step 3: Cross multiply
    85,447.60x = 117,916.90 × 47,207.08
  4. Step 4: Simplify right side
    85,447.60x = 5,566,512,531.65
  5. Step 5: Solve for x
    x = 5,566,512,531.65/85,447.60
  6. Step 6: Final answer
    x = 65,145.34

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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.