Home / 216,487,389.83-298,795,999.73-128,430,264.83

Finding the Fourth Proportional to 216,487,389.83, 298,795,999.73 and 128,430,264.83

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Solution

The fourth proportional to 216,487,389.83, 298,795,999.73 and 128,430,264.83 is: 177,259,513.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,487,389.83 : 298,795,999.73 = 128,430,264.83 : x
  2. Step 2: Convert to fraction form
    216,487,389.83/298,795,999.73 = 128,430,264.83/x
  3. Step 3: Cross multiply
    216,487,389.83x = 298,795,999.73 × 128,430,264.83
  4. Step 4: Simplify right side
    216,487,389.83x = 38,374,449,375,468,512
  5. Step 5: Solve for x
    x = 38,374,449,375,468,512/216,487,389.83
  6. Step 6: Final answer
    x = 177,259,513.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.