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Finding the Fourth Proportional to 140,773.20, 210,865.40 and 65,957.20

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Solution

The fourth proportional to 140,773.20, 210,865.40 and 65,957.20 is: 98,797.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,773.20 : 210,865.40 = 65,957.20 : x
  2. Step 2: Convert to fraction form
    140,773.20/210,865.40 = 65,957.20/x
  3. Step 3: Cross multiply
    140,773.20x = 210,865.40 × 65,957.20
  4. Step 4: Simplify right side
    140,773.20x = 13,908,091,360.88
  5. Step 5: Solve for x
    x = 13,908,091,360.88/140,773.20
  6. Step 6: Final answer
    x = 98,797.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.