Home / 85,760.10-128,645.01-26,604.18

Finding the Fourth Proportional to 85,760.10, 128,645.01 and 26,604.18

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Solution

The fourth proportional to 85,760.10, 128,645.01 and 26,604.18 is: 39,907.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,760.10 : 128,645.01 = 26,604.18 : x
  2. Step 2: Convert to fraction form
    85,760.10/128,645.01 = 26,604.18/x
  3. Step 3: Cross multiply
    85,760.10x = 128,645.01 × 26,604.18
  4. Step 4: Simplify right side
    85,760.10x = 3,422,495,002.14
  5. Step 5: Solve for x
    x = 3,422,495,002.14/85,760.10
  6. Step 6: Final answer
    x = 39,907.78

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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.