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Finding the Fourth Proportional to 112,868.44, 155,718.30 and 65,133.88

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Solution

The fourth proportional to 112,868.44, 155,718.30 and 65,133.88 is: 89,861.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,868.44 : 155,718.30 = 65,133.88 : x
  2. Step 2: Convert to fraction form
    112,868.44/155,718.30 = 65,133.88/x
  3. Step 3: Cross multiply
    112,868.44x = 155,718.30 × 65,133.88
  4. Step 4: Simplify right side
    112,868.44x = 10,142,537,066.00
  5. Step 5: Solve for x
    x = 10,142,537,066.00/112,868.44
  6. Step 6: Final answer
    x = 89,861.59

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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.