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Finding the Fourth Proportional to 172,415,920.40, 258,661,205.40 and 51,259,619.60

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Solution

The fourth proportional to 172,415,920.40, 258,661,205.40 and 51,259,619.60 is: 76,900,526.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,415,920.40 : 258,661,205.40 = 51,259,619.60 : x
  2. Step 2: Convert to fraction form
    172,415,920.40/258,661,205.40 = 51,259,619.60/x
  3. Step 3: Cross multiply
    172,415,920.40x = 258,661,205.40 × 51,259,619.60
  4. Step 4: Simplify right side
    172,415,920.40x = 13,258,874,994,081,466
  5. Step 5: Solve for x
    x = 13,258,874,994,081,466/172,415,920.40
  6. Step 6: Final answer
    x = 76,900,526.14

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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.