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Finding the Fourth Proportional to 140,898.72, 211,439.68 and 61,014.70

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Solution

The fourth proportional to 140,898.72, 211,439.68 and 61,014.70 is: 91,561.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,898.72 : 211,439.68 = 61,014.70 : x
  2. Step 2: Convert to fraction form
    140,898.72/211,439.68 = 61,014.70/x
  3. Step 3: Cross multiply
    140,898.72x = 211,439.68 × 61,014.70
  4. Step 4: Simplify right side
    140,898.72x = 12,900,927,281.02
  5. Step 5: Solve for x
    x = 12,900,927,281.02/140,898.72
  6. Step 6: Final answer
    x = 91,561.71

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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.