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Finding the Fourth Proportional to 85,638.60, 118,178.83 and 47,399.72

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Solution

The fourth proportional to 85,638.60, 118,178.83 and 47,399.72 is: 65,410.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,638.60 : 118,178.83 = 47,399.72 : x
  2. Step 2: Convert to fraction form
    85,638.60/118,178.83 = 47,399.72/x
  3. Step 3: Cross multiply
    85,638.60x = 118,178.83 × 47,399.72
  4. Step 4: Simplify right side
    85,638.60x = 5,601,642,920.28
  5. Step 5: Solve for x
    x = 5,601,642,920.28/85,638.60
  6. Step 6: Final answer
    x = 65,410.26

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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.