Home / 281,823,999.40-422,735,999.10-128,768,991.40

Finding the Fourth Proportional to 281,823,999.40, 422,735,999.10 and 128,768,991.40

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Solution

The fourth proportional to 281,823,999.40, 422,735,999.10 and 128,768,991.40 is: 193,153,487.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,823,999.40 : 422,735,999.10 = 128,768,991.40 : x
  2. Step 2: Convert to fraction form
    281,823,999.40/422,735,999.10 = 128,768,991.40/x
  3. Step 3: Cross multiply
    281,823,999.40x = 422,735,999.10 × 128,768,991.40
  4. Step 4: Simplify right side
    281,823,999.40x = 54,435,288,232,578,312
  5. Step 5: Solve for x
    x = 54,435,288,232,578,312/281,823,999.40
  6. Step 6: Final answer
    x = 193,153,487.10

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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.