Home / 156,831.41-216,427-85,211.72

Finding the Fourth Proportional to 156,831.41, 216,427 and 85,211.72

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Solution

The fourth proportional to 156,831.41, 216,427 and 85,211.72 is: 117,591.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,831.41 : 216,427 = 85,211.72 : x
  2. Step 2: Convert to fraction form
    156,831.41/216,427 = 85,211.72/x
  3. Step 3: Cross multiply
    156,831.41x = 216,427 × 85,211.72
  4. Step 4: Simplify right side
    156,831.41x = 18,442,116,924.44
  5. Step 5: Solve for x
    x = 18,442,116,924.44/156,831.41
  6. Step 6: Final answer
    x = 117,591.99

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1.5x scale

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.