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Finding the Fourth Proportional to 77,945,908.40, 109,303,430.80 and 77,945,908.40

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Solution

The fourth proportional to 77,945,908.40, 109,303,430.80 and 77,945,908.40 is: 109,303,430.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,945,908.40 : 109,303,430.80 = 77,945,908.40 : x
  2. Step 2: Convert to fraction form
    77,945,908.40/109,303,430.80 = 77,945,908.40/x
  3. Step 3: Cross multiply
    77,945,908.40x = 109,303,430.80 × 77,945,908.40
  4. Step 4: Simplify right side
    77,945,908.40x = 8,519,755,204,942,539
  5. Step 5: Solve for x
    x = 8,519,755,204,942,539/77,945,908.40
  6. Step 6: Final answer
    x = 109,303,430.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.