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Finding the Fourth Proportional to 64,869.87, 89,520.36 and 35,061.87

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Solution

The fourth proportional to 64,869.87, 89,520.36 and 35,061.87 is: 48,385.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,869.87 : 89,520.36 = 35,061.87 : x
  2. Step 2: Convert to fraction form
    64,869.87/89,520.36 = 35,061.87/x
  3. Step 3: Cross multiply
    64,869.87x = 89,520.36 × 35,061.87
  4. Step 4: Simplify right side
    64,869.87x = 3,138,751,224.67
  5. Step 5: Solve for x
    x = 3,138,751,224.67/64,869.87
  6. Step 6: Final answer
    x = 48,385.35

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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.