Home / 85,474.20-128,212.95-26,309.81

Finding the Fourth Proportional to 85,474.20, 128,212.95 and 26,309.81

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Solution

The fourth proportional to 85,474.20, 128,212.95 and 26,309.81 is: 39,465.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,474.20 : 128,212.95 = 26,309.81 : x
  2. Step 2: Convert to fraction form
    85,474.20/128,212.95 = 26,309.81/x
  3. Step 3: Cross multiply
    85,474.20x = 128,212.95 × 26,309.81
  4. Step 4: Simplify right side
    85,474.20x = 3,373,258,354.04
  5. Step 5: Solve for x
    x = 3,373,258,354.04/85,474.20
  6. Step 6: Final answer
    x = 39,465.22

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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.