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Finding the Fourth Proportional to 66,840.75, 92,240.24 and 39,984.39

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Solution

The fourth proportional to 66,840.75, 92,240.24 and 39,984.39 is: 55,178.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,840.75 : 92,240.24 = 39,984.39 : x
  2. Step 2: Convert to fraction form
    66,840.75/92,240.24 = 39,984.39/x
  3. Step 3: Cross multiply
    66,840.75x = 92,240.24 × 39,984.39
  4. Step 4: Simplify right side
    66,840.75x = 3,688,169,529.93
  5. Step 5: Solve for x
    x = 3,688,169,529.93/66,840.75
  6. Step 6: Final answer
    x = 55,178.46

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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.