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Finding the Fourth Proportional to 140,557.95, 210,778.93 and 53,990.74

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Solution

The fourth proportional to 140,557.95, 210,778.93 and 53,990.74 is: 80,963.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,557.95 : 210,778.93 = 53,990.74 : x
  2. Step 2: Convert to fraction form
    140,557.95/210,778.93 = 53,990.74/x
  3. Step 3: Cross multiply
    140,557.95x = 210,778.93 × 53,990.74
  4. Step 4: Simplify right side
    140,557.95x = 11,380,110,407.11
  5. Step 5: Solve for x
    x = 11,380,110,407.11/140,557.95
  6. Step 6: Final answer
    x = 80,963.83

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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.