Home / 255,831.51-383,748.20-78,337.80

Finding the Fourth Proportional to 255,831.51, 383,748.20 and 78,337.80

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Solution

The fourth proportional to 255,831.51, 383,748.20 and 78,337.80 is: 117,506.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,831.51 : 383,748.20 = 78,337.80 : x
  2. Step 2: Convert to fraction form
    255,831.51/383,748.20 = 78,337.80/x
  3. Step 3: Cross multiply
    255,831.51x = 383,748.20 × 78,337.80
  4. Step 4: Simplify right side
    255,831.51x = 30,061,989,350.27
  5. Step 5: Solve for x
    x = 30,061,989,350.27/255,831.51
  6. Step 6: Final answer
    x = 117,506.98

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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.