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Finding the Fourth Proportional to 66,642.40, 99,801.60 and 35,408.80

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Solution

The fourth proportional to 66,642.40, 99,801.60 and 35,408.80 is: 53,027.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,642.40 : 99,801.60 = 35,408.80 : x
  2. Step 2: Convert to fraction form
    66,642.40/99,801.60 = 35,408.80/x
  3. Step 3: Cross multiply
    66,642.40x = 99,801.60 × 35,408.80
  4. Step 4: Simplify right side
    66,642.40x = 3,533,854,894.08
  5. Step 5: Solve for x
    x = 3,533,854,894.08/66,642.40
  6. Step 6: Final answer
    x = 53,027.13

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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.