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Finding the Fourth Proportional to 66,751.92, 92,108.58 and 39,888.72

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Solution

The fourth proportional to 66,751.92, 92,108.58 and 39,888.72 is: 55,041.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,751.92 : 92,108.58 = 39,888.72 : x
  2. Step 2: Convert to fraction form
    66,751.92/92,108.58 = 39,888.72/x
  3. Step 3: Cross multiply
    66,751.92x = 92,108.58 × 39,888.72
  4. Step 4: Simplify right side
    66,751.92x = 3,674,093,357.22
  5. Step 5: Solve for x
    x = 3,674,093,357.22/66,751.92
  6. Step 6: Final answer
    x = 55,041.01

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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.