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Finding the Fourth Proportional to 72,454.40, 108,811.20 and 70,121.60

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Solution

The fourth proportional to 72,454.40, 108,811.20 and 70,121.60 is: 105,307.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,454.40 : 108,811.20 = 70,121.60 : x
  2. Step 2: Convert to fraction form
    72,454.40/108,811.20 = 70,121.60/x
  3. Step 3: Cross multiply
    72,454.40x = 108,811.20 × 70,121.60
  4. Step 4: Simplify right side
    72,454.40x = 7,630,015,441.92
  5. Step 5: Solve for x
    x = 7,630,015,441.92/72,454.40
  6. Step 6: Final answer
    x = 105,307.83

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1.5x scale

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.