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Finding the Fourth Proportional to 78,138.76, 107,831.10 and 44,604.76

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Solution

The fourth proportional to 78,138.76, 107,831.10 and 44,604.76 is: 61,554.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,138.76 : 107,831.10 = 44,604.76 : x
  2. Step 2: Convert to fraction form
    78,138.76/107,831.10 = 44,604.76/x
  3. Step 3: Cross multiply
    78,138.76x = 107,831.10 × 44,604.76
  4. Step 4: Simplify right side
    78,138.76x = 4,809,780,336.04
  5. Step 5: Solve for x
    x = 4,809,780,336.04/78,138.76
  6. Step 6: Final answer
    x = 61,554.35

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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.