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Finding the Fourth Proportional to 89,113.70, 122,976.88 and 53,312.12

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Solution

The fourth proportional to 89,113.70, 122,976.88 and 53,312.12 is: 73,570.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,113.70 : 122,976.88 = 53,312.12 : x
  2. Step 2: Convert to fraction form
    89,113.70/122,976.88 = 53,312.12/x
  3. Step 3: Cross multiply
    89,113.70x = 122,976.88 × 53,312.12
  4. Step 4: Simplify right side
    89,113.70x = 6,556,158,183.79
  5. Step 5: Solve for x
    x = 6,556,158,183.79/89,113.70
  6. Step 6: Final answer
    x = 73,570.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.