Home / 217,325.07-299,908.40-121,831.76

Finding the Fourth Proportional to 217,325.07, 299,908.40 and 121,831.76

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Solution

The fourth proportional to 217,325.07, 299,908.40 and 121,831.76 is: 168,127.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,325.07 : 299,908.40 = 121,831.76 : x
  2. Step 2: Convert to fraction form
    217,325.07/299,908.40 = 121,831.76/x
  3. Step 3: Cross multiply
    217,325.07x = 299,908.40 × 121,831.76
  4. Step 4: Simplify right side
    217,325.07x = 36,538,368,351.40
  5. Step 5: Solve for x
    x = 36,538,368,351.40/217,325.07
  6. Step 6: Final answer
    x = 168,127.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.