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Finding the Fourth Proportional to 99,497.70, 149,246.55 and 77,379.30

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Solution

The fourth proportional to 99,497.70, 149,246.55 and 77,379.30 is: 116,068.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,497.70 : 149,246.55 = 77,379.30 : x
  2. Step 2: Convert to fraction form
    99,497.70/149,246.55 = 77,379.30/x
  3. Step 3: Cross multiply
    99,497.70x = 149,246.55 × 77,379.30
  4. Step 4: Simplify right side
    99,497.70x = 11,548,593,566.42
  5. Step 5: Solve for x
    x = 11,548,593,566.42/99,497.70
  6. Step 6: Final answer
    x = 116,068.95

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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.