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Finding the Fourth Proportional to 74,679,980.80, 112,019,971.20 and 65,722,028.80

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Solution

The fourth proportional to 74,679,980.80, 112,019,971.20 and 65,722,028.80 is: 98,583,043.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,679,980.80 : 112,019,971.20 = 65,722,028.80 : x
  2. Step 2: Convert to fraction form
    74,679,980.80/112,019,971.20 = 65,722,028.80/x
  3. Step 3: Cross multiply
    74,679,980.80x = 112,019,971.20 × 65,722,028.80
  4. Step 4: Simplify right side
    74,679,980.80x = 7,362,179,773,381,570
  5. Step 5: Solve for x
    x = 7,362,179,773,381,570/74,679,980.80
  6. Step 6: Final answer
    x = 98,583,043.20

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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.