Home / 85,982,006.40-128,973,009.60-66,826,510.80

Finding the Fourth Proportional to 85,982,006.40, 128,973,009.60 and 66,826,510.80

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Solution

The fourth proportional to 85,982,006.40, 128,973,009.60 and 66,826,510.80 is: 100,239,766.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,982,006.40 : 128,973,009.60 = 66,826,510.80 : x
  2. Step 2: Convert to fraction form
    85,982,006.40/128,973,009.60 = 66,826,510.80/x
  3. Step 3: Cross multiply
    85,982,006.40x = 128,973,009.60 × 66,826,510.80
  4. Step 4: Simplify right side
    85,982,006.40x = 8,618,816,218,942,903
  5. Step 5: Solve for x
    x = 8,618,816,218,942,903/85,982,006.40
  6. Step 6: Final answer
    x = 100,239,766.20

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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.