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Finding the Fourth Proportional to 72,651.36, 100,303.60 and 57,604.80

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Solution

The fourth proportional to 72,651.36, 100,303.60 and 57,604.80 is: 79,530.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,651.36 : 100,303.60 = 57,604.80 : x
  2. Step 2: Convert to fraction form
    72,651.36/100,303.60 = 57,604.80/x
  3. Step 3: Cross multiply
    72,651.36x = 100,303.60 × 57,604.80
  4. Step 4: Simplify right side
    72,651.36x = 5,777,968,817.28
  5. Step 5: Solve for x
    x = 5,777,968,817.28/72,651.36
  6. Step 6: Final answer
    x = 79,530.08

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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.