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Finding the Fourth Proportional to 155,405,903.60, 217,886,770 and 155,405,903.60

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Solution

The fourth proportional to 155,405,903.60, 217,886,770 and 155,405,903.60 is: 217,886,770

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,405,903.60 : 217,886,770 = 155,405,903.60 : x
  2. Step 2: Convert to fraction form
    155,405,903.60/217,886,770 = 155,405,903.60/x
  3. Step 3: Cross multiply
    155,405,903.60x = 217,886,770 × 155,405,903.60
  4. Step 4: Simplify right side
    155,405,903.60x = 33,860,890,374,335,372
  5. Step 5: Solve for x
    x = 33,860,890,374,335,372/155,405,903.60
  6. Step 6: Final answer
    x = 217,886,770

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.