Home / 85,815.10-128,734.80-26,644.60

Finding the Fourth Proportional to 85,815.10, 128,734.80 and 26,644.60

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Solution

The fourth proportional to 85,815.10, 128,734.80 and 26,644.60 is: 39,970.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,815.10 : 128,734.80 = 26,644.60 : x
  2. Step 2: Convert to fraction form
    85,815.10/128,734.80 = 26,644.60/x
  3. Step 3: Cross multiply
    85,815.10x = 128,734.80 × 26,644.60
  4. Step 4: Simplify right side
    85,815.10x = 3,430,087,252.08
  5. Step 5: Solve for x
    x = 3,430,087,252.08/85,815.10
  6. Step 6: Final answer
    x = 39,970.67

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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.