Home / 85,826.10-128,751.30-26,655.60

Finding the Fourth Proportional to 85,826.10, 128,751.30 and 26,655.60

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Solution

The fourth proportional to 85,826.10, 128,751.30 and 26,655.60 is: 39,987.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,826.10 : 128,751.30 = 26,655.60 : x
  2. Step 2: Convert to fraction form
    85,826.10/128,751.30 = 26,655.60/x
  3. Step 3: Cross multiply
    85,826.10x = 128,751.30 × 26,655.60
  4. Step 4: Simplify right side
    85,826.10x = 3,431,943,152.28
  5. Step 5: Solve for x
    x = 3,431,943,152.28/85,826.10
  6. Step 6: Final answer
    x = 39,987.17

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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.