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Finding the Fourth Proportional to 60,693,124.80, 91,039,687.20 and 40,285,790.40

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Solution

The fourth proportional to 60,693,124.80, 91,039,687.20 and 40,285,790.40 is: 60,428,685.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,693,124.80 : 91,039,687.20 = 40,285,790.40 : x
  2. Step 2: Convert to fraction form
    60,693,124.80/91,039,687.20 = 40,285,790.40/x
  3. Step 3: Cross multiply
    60,693,124.80x = 91,039,687.20 × 40,285,790.40
  4. Step 4: Simplify right side
    60,693,124.80x = 3,667,605,756,620,763
  5. Step 5: Solve for x
    x = 3,667,605,756,620,763/60,693,124.80
  6. Step 6: Final answer
    x = 60,428,685.60

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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.