Home / 85,699.45-128,528.20-35,779.96

Finding the Fourth Proportional to 85,699.45, 128,528.20 and 35,779.96

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Solution

The fourth proportional to 85,699.45, 128,528.20 and 35,779.96 is: 53,661.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,699.45 : 128,528.20 = 35,779.96 : x
  2. Step 2: Convert to fraction form
    85,699.45/128,528.20 = 35,779.96/x
  3. Step 3: Cross multiply
    85,699.45x = 128,528.20 × 35,779.96
  4. Step 4: Simplify right side
    85,699.45x = 4,598,733,854.87
  5. Step 5: Solve for x
    x = 4,598,733,854.87/85,699.45
  6. Step 6: Final answer
    x = 53,661.18

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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.