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Finding the Fourth Proportional to 85,779.84, 128,670.48 and 33,195.36

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Solution

The fourth proportional to 85,779.84, 128,670.48 and 33,195.36 is: 49,793.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,779.84 : 128,670.48 = 33,195.36 : x
  2. Step 2: Convert to fraction form
    85,779.84/128,670.48 = 33,195.36/x
  3. Step 3: Cross multiply
    85,779.84x = 128,670.48 × 33,195.36
  4. Step 4: Simplify right side
    85,779.84x = 4,271,262,904.97
  5. Step 5: Solve for x
    x = 4,271,262,904.97/85,779.84
  6. Step 6: Final answer
    x = 49,793.32

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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.