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Finding the Fourth Proportional to 55,392.58, 76,431.63 and 36,518.50

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Solution

The fourth proportional to 55,392.58, 76,431.63 and 36,518.50 is: 50,388.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,392.58 : 76,431.63 = 36,518.50 : x
  2. Step 2: Convert to fraction form
    55,392.58/76,431.63 = 36,518.50/x
  3. Step 3: Cross multiply
    55,392.58x = 76,431.63 × 36,518.50
  4. Step 4: Simplify right side
    55,392.58x = 2,791,168,480.16
  5. Step 5: Solve for x
    x = 2,791,168,480.16/55,392.58
  6. Step 6: Final answer
    x = 50,388.85

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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.