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Finding the Fourth Proportional to 65,009.31, 89,719.21 and 39,513.44

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Solution

The fourth proportional to 65,009.31, 89,719.21 and 39,513.44 is: 54,532.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,009.31 : 89,719.21 = 39,513.44 : x
  2. Step 2: Convert to fraction form
    65,009.31/89,719.21 = 39,513.44/x
  3. Step 3: Cross multiply
    65,009.31x = 89,719.21 × 39,513.44
  4. Step 4: Simplify right side
    65,009.31x = 3,545,114,621.18
  5. Step 5: Solve for x
    x = 3,545,114,621.18/65,009.31
  6. Step 6: Final answer
    x = 54,532.41

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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.