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Finding the Fourth Proportional to 64,796.80, 89,416.56 and 43,572.64

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Solution

The fourth proportional to 64,796.80, 89,416.56 and 43,572.64 is: 60,128.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,796.80 : 89,416.56 = 43,572.64 : x
  2. Step 2: Convert to fraction form
    64,796.80/89,416.56 = 43,572.64/x
  3. Step 3: Cross multiply
    64,796.80x = 89,416.56 × 43,572.64
  4. Step 4: Simplify right side
    64,796.80x = 3,896,115,578.92
  5. Step 5: Solve for x
    x = 3,896,115,578.92/64,796.80
  6. Step 6: Final answer
    x = 60,128.21

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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.