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Finding the Fourth Proportional to 64,567, 89,107.32 and 39,421.36

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Solution

The fourth proportional to 64,567, 89,107.32 and 39,421.36 is: 54,404.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,567 : 89,107.32 = 39,421.36 : x
  2. Step 2: Convert to fraction form
    64,567/89,107.32 = 39,421.36/x
  3. Step 3: Cross multiply
    64,567x = 89,107.32 × 39,421.36
  4. Step 4: Simplify right side
    64,567x = 3,512,731,740.36
  5. Step 5: Solve for x
    x = 3,512,731,740.36/64,567
  6. Step 6: Final answer
    x = 54,404.44

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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.