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Finding the Fourth Proportional to 64,899.17, 89,567.12 and 39,399.62

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Solution

The fourth proportional to 64,899.17, 89,567.12 and 39,399.62 is: 54,375.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,899.17 : 89,567.12 = 39,399.62 : x
  2. Step 2: Convert to fraction form
    64,899.17/89,567.12 = 39,399.62/x
  3. Step 3: Cross multiply
    64,899.17x = 89,567.12 × 39,399.62
  4. Step 4: Simplify right side
    64,899.17x = 3,528,910,492.49
  5. Step 5: Solve for x
    x = 3,528,910,492.49/64,899.17
  6. Step 6: Final answer
    x = 54,375.28

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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.