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Finding the Fourth Proportional to 64,706.32, 89,280.99 and 40,819.15

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Solution

The fourth proportional to 64,706.32, 89,280.99 and 40,819.15 is: 56,321.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,706.32 : 89,280.99 = 40,819.15 : x
  2. Step 2: Convert to fraction form
    64,706.32/89,280.99 = 40,819.15/x
  3. Step 3: Cross multiply
    64,706.32x = 89,280.99 × 40,819.15
  4. Step 4: Simplify right side
    64,706.32x = 3,644,374,098.26
  5. Step 5: Solve for x
    x = 3,644,374,098.26/64,706.32
  6. Step 6: Final answer
    x = 56,321.77

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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.