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Finding the Fourth Proportional to 64,856.19, 89,487.94 and 39,375.97

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Solution

The fourth proportional to 64,856.19, 89,487.94 and 39,375.97 is: 54,330.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,856.19 : 89,487.94 = 39,375.97 : x
  2. Step 2: Convert to fraction form
    64,856.19/89,487.94 = 39,375.97/x
  3. Step 3: Cross multiply
    64,856.19x = 89,487.94 × 39,375.97
  4. Step 4: Simplify right side
    64,856.19x = 3,523,674,695.84
  5. Step 5: Solve for x
    x = 3,523,674,695.84/64,856.19
  6. Step 6: Final answer
    x = 54,330.58

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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.