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Finding the Fourth Proportional to 61,915.36, 85,443.36 and 33,620.80

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Solution

The fourth proportional to 61,915.36, 85,443.36 and 33,620.80 is: 46,396.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,915.36 : 85,443.36 = 33,620.80 : x
  2. Step 2: Convert to fraction form
    61,915.36/85,443.36 = 33,620.80/x
  3. Step 3: Cross multiply
    61,915.36x = 85,443.36 × 33,620.80
  4. Step 4: Simplify right side
    61,915.36x = 2,872,674,117.89
  5. Step 5: Solve for x
    x = 2,872,674,117.89/61,915.36
  6. Step 6: Final answer
    x = 46,396.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.