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Finding the Fourth Proportional to 61,684.65, 85,080.78 and 42,571.65

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Solution

The fourth proportional to 61,684.65, 85,080.78 and 42,571.65 is: 58,718.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,684.65 : 85,080.78 = 42,571.65 : x
  2. Step 2: Convert to fraction form
    61,684.65/85,080.78 = 42,571.65/x
  3. Step 3: Cross multiply
    61,684.65x = 85,080.78 × 42,571.65
  4. Step 4: Simplify right side
    61,684.65x = 3,622,029,187.89
  5. Step 5: Solve for x
    x = 3,622,029,187.89/61,684.65
  6. Step 6: Final answer
    x = 58,718.48

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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.