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Finding the Fourth Proportional to 208,928.60, 313,565.70 and 96,781.40

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Solution

The fourth proportional to 208,928.60, 313,565.70 and 96,781.40 is: 145,252.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,928.60 : 313,565.70 = 96,781.40 : x
  2. Step 2: Convert to fraction form
    208,928.60/313,565.70 = 96,781.40/x
  3. Step 3: Cross multiply
    208,928.60x = 313,565.70 × 96,781.40
  4. Step 4: Simplify right side
    208,928.60x = 30,347,327,437.98
  5. Step 5: Solve for x
    x = 30,347,327,437.98/208,928.60
  6. Step 6: Final answer
    x = 145,252.15

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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.