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Finding the Fourth Proportional to 64,458.89, 96,688.05 and 20,085.67

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Solution

The fourth proportional to 64,458.89, 96,688.05 and 20,085.67 is: 30,128.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,458.89 : 96,688.05 = 20,085.67 : x
  2. Step 2: Convert to fraction form
    64,458.89/96,688.05 = 20,085.67/x
  3. Step 3: Cross multiply
    64,458.89x = 96,688.05 × 20,085.67
  4. Step 4: Simplify right side
    64,458.89x = 1,942,044,310.78
  5. Step 5: Solve for x
    x = 1,942,044,310.78/64,458.89
  6. Step 6: Final answer
    x = 30,128.42

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1.5x scale

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.