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Finding the Fourth Proportional to 64,977.12, 89,641.74 and 43,763.16

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Solution

The fourth proportional to 64,977.12, 89,641.74 and 43,763.16 is: 60,375.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,977.12 : 89,641.74 = 43,763.16 : x
  2. Step 2: Convert to fraction form
    64,977.12/89,641.74 = 43,763.16/x
  3. Step 3: Cross multiply
    64,977.12x = 89,641.74 × 43,763.16
  4. Step 4: Simplify right side
    64,977.12x = 3,923,005,810.30
  5. Step 5: Solve for x
    x = 3,923,005,810.30/64,977.12
  6. Step 6: Final answer
    x = 60,375.19

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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.