Home / 85,843,867.78-128,765,836.47-21,148,932.58

Finding the Fourth Proportional to 85,843,867.78, 128,765,836.47 and 21,148,932.58

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Solution

The fourth proportional to 85,843,867.78, 128,765,836.47 and 21,148,932.58 is: 31,723,407.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,843,867.78 : 128,765,836.47 = 21,148,932.58 : x
  2. Step 2: Convert to fraction form
    85,843,867.78/128,765,836.47 = 21,148,932.58/x
  3. Step 3: Cross multiply
    85,843,867.78x = 128,765,836.47 × 21,148,932.58
  4. Step 4: Simplify right side
    85,843,867.78x = 2,723,259,994,111,335
  5. Step 5: Solve for x
    x = 2,723,259,994,111,335/85,843,867.78
  6. Step 6: Final answer
    x = 31,723,407.44

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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.