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Finding the Fourth Proportional to 85,075.72, 127,639.74 and 43,551.88

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Solution

The fourth proportional to 85,075.72, 127,639.74 and 43,551.88 is: 65,341.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,075.72 : 127,639.74 = 43,551.88 : x
  2. Step 2: Convert to fraction form
    85,075.72/127,639.74 = 43,551.88/x
  3. Step 3: Cross multiply
    85,075.72x = 127,639.74 × 43,551.88
  4. Step 4: Simplify right side
    85,075.72x = 5,558,950,639.71
  5. Step 5: Solve for x
    x = 5,558,950,639.71/85,075.72
  6. Step 6: Final answer
    x = 65,341.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.