Home / 85,481,412.39-128,220,320.39-20,785,549.23

Finding the Fourth Proportional to 85,481,412.39, 128,220,320.39 and 20,785,549.23

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Solution

The fourth proportional to 85,481,412.39, 128,220,320.39 and 20,785,549.23 is: 31,177,886.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,481,412.39 : 128,220,320.39 = 20,785,549.23 : x
  2. Step 2: Convert to fraction form
    85,481,412.39/128,220,320.39 = 20,785,549.23/x
  3. Step 3: Cross multiply
    85,481,412.39x = 128,220,320.39 × 20,785,549.23
  4. Step 4: Simplify right side
    85,481,412.39x = 2,665,129,781,648,790
  5. Step 5: Solve for x
    x = 2,665,129,781,648,790/85,481,412.39
  6. Step 6: Final answer
    x = 31,177,886.60

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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.