Home / 91,931.18-126,879.79-85,927.86

Finding the Fourth Proportional to 91,931.18, 126,879.79 and 85,927.86

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Solution

The fourth proportional to 91,931.18, 126,879.79 and 85,927.86 is: 118,594.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,931.18 : 126,879.79 = 85,927.86 : x
  2. Step 2: Convert to fraction form
    91,931.18/126,879.79 = 85,927.86/x
  3. Step 3: Cross multiply
    91,931.18x = 126,879.79 × 85,927.86
  4. Step 4: Simplify right side
    91,931.18x = 10,902,508,831.95
  5. Step 5: Solve for x
    x = 10,902,508,831.95/91,931.18
  6. Step 6: Final answer
    x = 118,594.24

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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.