Home / 85,012.51-127,464.09-40,638.28

Finding the Fourth Proportional to 85,012.51, 127,464.09 and 40,638.28

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Solution

The fourth proportional to 85,012.51, 127,464.09 and 40,638.28 is: 60,931.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,012.51 : 127,464.09 = 40,638.28 : x
  2. Step 2: Convert to fraction form
    85,012.51/127,464.09 = 40,638.28/x
  3. Step 3: Cross multiply
    85,012.51x = 127,464.09 × 40,638.28
  4. Step 4: Simplify right side
    85,012.51x = 5,179,921,379.37
  5. Step 5: Solve for x
    x = 5,179,921,379.37/85,012.51
  6. Step 6: Final answer
    x = 60,931.28

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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.