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Finding the Fourth Proportional to 85,779.54, 128,624.31 and 35,850.42

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Solution

The fourth proportional to 85,779.54, 128,624.31 and 35,850.42 is: 53,756.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,779.54 : 128,624.31 = 35,850.42 : x
  2. Step 2: Convert to fraction form
    85,779.54/128,624.31 = 35,850.42/x
  3. Step 3: Cross multiply
    85,779.54x = 128,624.31 × 35,850.42
  4. Step 4: Simplify right side
    85,779.54x = 4,611,235,535.71
  5. Step 5: Solve for x
    x = 4,611,235,535.71/85,779.54
  6. Step 6: Final answer
    x = 53,756.82

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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.