Home / 85,749.36-128,667.90-40,821.48

Finding the Fourth Proportional to 85,749.36, 128,667.90 and 40,821.48

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Solution

The fourth proportional to 85,749.36, 128,667.90 and 40,821.48 is: 61,253.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,749.36 : 128,667.90 = 40,821.48 : x
  2. Step 2: Convert to fraction form
    85,749.36/128,667.90 = 40,821.48/x
  3. Step 3: Cross multiply
    85,749.36x = 128,667.90 × 40,821.48
  4. Step 4: Simplify right side
    85,749.36x = 5,252,414,106.49
  5. Step 5: Solve for x
    x = 5,252,414,106.49/85,749.36
  6. Step 6: Final answer
    x = 61,253.10

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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.