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Finding the Fourth Proportional to 76,628,679.60, 114,943,019.40 and 68,314,580.40

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Solution

The fourth proportional to 76,628,679.60, 114,943,019.40 and 68,314,580.40 is: 102,471,870.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,628,679.60 : 114,943,019.40 = 68,314,580.40 : x
  2. Step 2: Convert to fraction form
    76,628,679.60/114,943,019.40 = 68,314,580.40/x
  3. Step 3: Cross multiply
    76,628,679.60x = 114,943,019.40 × 68,314,580.40
  4. Step 4: Simplify right side
    76,628,679.60x = 7,852,284,140,220,061
  5. Step 5: Solve for x
    x = 7,852,284,140,220,061/76,628,679.60
  6. Step 6: Final answer
    x = 102,471,870.60

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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.