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Finding the Fourth Proportional to 66,180.80, 99,261.60 and 19,428.80

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Solution

The fourth proportional to 66,180.80, 99,261.60 and 19,428.80 is: 29,140.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,180.80 : 99,261.60 = 19,428.80 : x
  2. Step 2: Convert to fraction form
    66,180.80/99,261.60 = 19,428.80/x
  3. Step 3: Cross multiply
    66,180.80x = 99,261.60 × 19,428.80
  4. Step 4: Simplify right side
    66,180.80x = 1,928,533,774.08
  5. Step 5: Solve for x
    x = 1,928,533,774.08/66,180.80
  6. Step 6: Final answer
    x = 29,140.38

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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.