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Finding the Fourth Proportional to 66,263.52, 91,411.44 and 39,387

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Solution

The fourth proportional to 66,263.52, 91,411.44 and 39,387 is: 54,334.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,263.52 : 91,411.44 = 39,387 : x
  2. Step 2: Convert to fraction form
    66,263.52/91,411.44 = 39,387/x
  3. Step 3: Cross multiply
    66,263.52x = 91,411.44 × 39,387
  4. Step 4: Simplify right side
    66,263.52x = 3,600,422,387.28
  5. Step 5: Solve for x
    x = 3,600,422,387.28/66,263.52
  6. Step 6: Final answer
    x = 54,334.91

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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.