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Finding the Fourth Proportional to 64,792.80, 89,415.54 and 36,115.40

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Solution

The fourth proportional to 64,792.80, 89,415.54 and 36,115.40 is: 49,840.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,792.80 : 89,415.54 = 36,115.40 : x
  2. Step 2: Convert to fraction form
    64,792.80/89,415.54 = 36,115.40/x
  3. Step 3: Cross multiply
    64,792.80x = 89,415.54 × 36,115.40
  4. Step 4: Simplify right side
    64,792.80x = 3,229,277,993.32
  5. Step 5: Solve for x
    x = 3,229,277,993.32/64,792.80
  6. Step 6: Final answer
    x = 49,840.07

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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.