Home / 66,112.10-99,155.42-18,715.72

Finding the Fourth Proportional to 66,112.10, 99,155.42 and 18,715.72

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Solution

The fourth proportional to 66,112.10, 99,155.42 and 18,715.72 is: 28,069.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,112.10 : 99,155.42 = 18,715.72 : x
  2. Step 2: Convert to fraction form
    66,112.10/99,155.42 = 18,715.72/x
  3. Step 3: Cross multiply
    66,112.10x = 99,155.42 × 18,715.72
  4. Step 4: Simplify right side
    66,112.10x = 1,855,765,077.20
  5. Step 5: Solve for x
    x = 1,855,765,077.20/66,112.10
  6. Step 6: Final answer
    x = 28,069.98

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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.