Home / 85,811,280.80-128,716,921.20-39,753,060.80

Finding the Fourth Proportional to 85,811,280.80, 128,716,921.20 and 39,753,060.80

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Solution

The fourth proportional to 85,811,280.80, 128,716,921.20 and 39,753,060.80 is: 59,629,591.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,811,280.80 : 128,716,921.20 = 39,753,060.80 : x
  2. Step 2: Convert to fraction form
    85,811,280.80/128,716,921.20 = 39,753,060.80/x
  3. Step 3: Cross multiply
    85,811,280.80x = 128,716,921.20 × 39,753,060.80
  4. Step 4: Simplify right side
    85,811,280.80x = 5,116,891,594,452,409
  5. Step 5: Solve for x
    x = 5,116,891,594,452,409/85,811,280.80
  6. Step 6: Final answer
    x = 59,629,591.20

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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.