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Finding the Fourth Proportional to 66,172.70, 99,177 and 31,038.54

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Solution

The fourth proportional to 66,172.70, 99,177 and 31,038.54 is: 46,519.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,172.70 : 99,177 = 31,038.54 : x
  2. Step 2: Convert to fraction form
    66,172.70/99,177 = 31,038.54/x
  3. Step 3: Cross multiply
    66,172.70x = 99,177 × 31,038.54
  4. Step 4: Simplify right side
    66,172.70x = 3,078,309,281.58
  5. Step 5: Solve for x
    x = 3,078,309,281.58/66,172.70
  6. Step 6: Final answer
    x = 46,519.32

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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.