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Finding the Fourth Proportional to 208,560.60, 312,913.80 and 90,316.80

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Solution

The fourth proportional to 208,560.60, 312,913.80 and 90,316.80 is: 135,506.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,560.60 : 312,913.80 = 90,316.80 : x
  2. Step 2: Convert to fraction form
    208,560.60/312,913.80 = 90,316.80/x
  3. Step 3: Cross multiply
    208,560.60x = 312,913.80 × 90,316.80
  4. Step 4: Simplify right side
    208,560.60x = 28,261,373,091.84
  5. Step 5: Solve for x
    x = 28,261,373,091.84/208,560.60
  6. Step 6: Final answer
    x = 135,506.77

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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.