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Finding the Fourth Proportional to 64,590.40, 96,885.60 and 41,147.20

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Solution

The fourth proportional to 64,590.40, 96,885.60 and 41,147.20 is: 61,720.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,590.40 : 96,885.60 = 41,147.20 : x
  2. Step 2: Convert to fraction form
    64,590.40/96,885.60 = 41,147.20/x
  3. Step 3: Cross multiply
    64,590.40x = 96,885.60 × 41,147.20
  4. Step 4: Simplify right side
    64,590.40x = 3,986,571,160.32
  5. Step 5: Solve for x
    x = 3,986,571,160.32/64,590.40
  6. Step 6: Final answer
    x = 61,720.80

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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.