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Finding the Fourth Proportional to 66,011.60, 99,017.40 and 41,128.40

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Solution

The fourth proportional to 66,011.60, 99,017.40 and 41,128.40 is: 61,692.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,011.60 : 99,017.40 = 41,128.40 : x
  2. Step 2: Convert to fraction form
    66,011.60/99,017.40 = 41,128.40/x
  3. Step 3: Cross multiply
    66,011.60x = 99,017.40 × 41,128.40
  4. Step 4: Simplify right side
    66,011.60x = 4,072,427,234.16
  5. Step 5: Solve for x
    x = 4,072,427,234.16/66,011.60
  6. Step 6: Final answer
    x = 61,692.60

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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.