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Finding the Fourth Proportional to 71,021.67, 106,431 and 52,153.71

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Solution

The fourth proportional to 71,021.67, 106,431 and 52,153.71 is: 78,156.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,021.67 : 106,431 = 52,153.71 : x
  2. Step 2: Convert to fraction form
    71,021.67/106,431 = 52,153.71/x
  3. Step 3: Cross multiply
    71,021.67x = 106,431 × 52,153.71
  4. Step 4: Simplify right side
    71,021.67x = 5,550,771,509.01
  5. Step 5: Solve for x
    x = 5,550,771,509.01/71,021.67
  6. Step 6: Final answer
    x = 78,156.03

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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.