Home / 85,831.78-128,723.06-25,866.06

Finding the Fourth Proportional to 85,831.78, 128,723.06 and 25,866.06

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Solution

The fourth proportional to 85,831.78, 128,723.06 and 25,866.06 is: 38,791.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,831.78 : 128,723.06 = 25,866.06 : x
  2. Step 2: Convert to fraction form
    85,831.78/128,723.06 = 25,866.06/x
  3. Step 3: Cross multiply
    85,831.78x = 128,723.06 × 25,866.06
  4. Step 4: Simplify right side
    85,831.78x = 3,329,558,393.34
  5. Step 5: Solve for x
    x = 3,329,558,393.34/85,831.78
  6. Step 6: Final answer
    x = 38,791.67

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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.