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Finding the Fourth Proportional to 97,880.70, 146,821.05 and 85,827.90

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Solution

The fourth proportional to 97,880.70, 146,821.05 and 85,827.90 is: 128,741.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,880.70 : 146,821.05 = 85,827.90 : x
  2. Step 2: Convert to fraction form
    97,880.70/146,821.05 = 85,827.90/x
  3. Step 3: Cross multiply
    97,880.70x = 146,821.05 × 85,827.90
  4. Step 4: Simplify right side
    97,880.70x = 12,601,342,397.30
  5. Step 5: Solve for x
    x = 12,601,342,397.30/97,880.70
  6. Step 6: Final answer
    x = 128,741.85

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Similar ratio
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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.