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Finding the Fourth Proportional to 85,665.63, 118,255.64 and 64,450.11

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Solution

The fourth proportional to 85,665.63, 118,255.64 and 64,450.11 is: 88,969.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,665.63 : 118,255.64 = 64,450.11 : x
  2. Step 2: Convert to fraction form
    85,665.63/118,255.64 = 64,450.11/x
  3. Step 3: Cross multiply
    85,665.63x = 118,255.64 × 64,450.11
  4. Step 4: Simplify right side
    85,665.63x = 7,621,588,683.87
  5. Step 5: Solve for x
    x = 7,621,588,683.87/85,665.63
  6. Step 6: Final answer
    x = 88,969.04

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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.