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Finding the Fourth Proportional to 78,874.46, 118,311.99 and 19,710.18

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Solution

The fourth proportional to 78,874.46, 118,311.99 and 19,710.18 is: 29,565.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,874.46 : 118,311.99 = 19,710.18 : x
  2. Step 2: Convert to fraction form
    78,874.46/118,311.99 = 19,710.18/x
  3. Step 3: Cross multiply
    78,874.46x = 118,311.99 × 19,710.18
  4. Step 4: Simplify right side
    78,874.46x = 2,331,950,619.06
  5. Step 5: Solve for x
    x = 2,331,950,619.06/78,874.46
  6. Step 6: Final answer
    x = 29,565.35

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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.