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Finding the Fourth Proportional to 140,551.72, 210,870.94 and 56,311.72

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Solution

The fourth proportional to 140,551.72, 210,870.94 and 56,311.72 is: 84,484.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,551.72 : 210,870.94 = 56,311.72 : x
  2. Step 2: Convert to fraction form
    140,551.72/210,870.94 = 56,311.72/x
  3. Step 3: Cross multiply
    140,551.72x = 210,870.94 × 56,311.72
  4. Step 4: Simplify right side
    140,551.72x = 11,874,505,329.42
  5. Step 5: Solve for x
    x = 11,874,505,329.42/140,551.72
  6. Step 6: Final answer
    x = 84,484.95

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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.