Home / 172,578,638.40-258,867,957.60-81,879,374.40

Finding the Fourth Proportional to 172,578,638.40, 258,867,957.60 and 81,879,374.40

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Solution

The fourth proportional to 172,578,638.40, 258,867,957.60 and 81,879,374.40 is: 122,819,061.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,578,638.40 : 258,867,957.60 = 81,879,374.40 : x
  2. Step 2: Convert to fraction form
    172,578,638.40/258,867,957.60 = 81,879,374.40/x
  3. Step 3: Cross multiply
    172,578,638.40x = 258,867,957.60 × 81,879,374.40
  4. Step 4: Simplify right side
    172,578,638.40x = 21,195,946,420,493,728
  5. Step 5: Solve for x
    x = 21,195,946,420,493,728/172,578,638.40
  6. Step 6: Final answer
    x = 122,819,061.60

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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.