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Finding the Fourth Proportional to 64,856.70, 89,488.63 and 39,376.48

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Solution

The fourth proportional to 64,856.70, 89,488.63 and 39,376.48 is: 54,331.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,856.70 : 89,488.63 = 39,376.48 : x
  2. Step 2: Convert to fraction form
    64,856.70/89,488.63 = 39,376.48/x
  3. Step 3: Cross multiply
    64,856.70x = 89,488.63 × 39,376.48
  4. Step 4: Simplify right side
    64,856.70x = 3,523,746,801.98
  5. Step 5: Solve for x
    x = 3,523,746,801.98/64,856.70
  6. Step 6: Final answer
    x = 54,331.27

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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.