Home / 66,408.16-99,612.40-19,661.60

Finding the Fourth Proportional to 66,408.16, 99,612.40 and 19,661.60

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Solution

The fourth proportional to 66,408.16, 99,612.40 and 19,661.60 is: 29,492.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,408.16 : 99,612.40 = 19,661.60 : x
  2. Step 2: Convert to fraction form
    66,408.16/99,612.40 = 19,661.60/x
  3. Step 3: Cross multiply
    66,408.16x = 99,612.40 × 19,661.60
  4. Step 4: Simplify right side
    66,408.16x = 1,958,539,163.84
  5. Step 5: Solve for x
    x = 1,958,539,163.84/66,408.16
  6. Step 6: Final answer
    x = 29,492.45

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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.