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Finding the Fourth Proportional to 69,990,334.80, 104,985,502.20 and 55,535,139.60

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Solution

The fourth proportional to 69,990,334.80, 104,985,502.20 and 55,535,139.60 is: 83,302,709.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,990,334.80 : 104,985,502.20 = 55,535,139.60 : x
  2. Step 2: Convert to fraction form
    69,990,334.80/104,985,502.20 = 55,535,139.60/x
  3. Step 3: Cross multiply
    69,990,334.80x = 104,985,502.20 × 55,535,139.60
  4. Step 4: Simplify right side
    69,990,334.80x = 5,830,384,520,653,107
  5. Step 5: Solve for x
    x = 5,830,384,520,653,107/69,990,334.80
  6. Step 6: Final answer
    x = 83,302,709.40

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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.