Home / 78,809,343.40-118,214,015.10-66,338,194.60

Finding the Fourth Proportional to 78,809,343.40, 118,214,015.10 and 66,338,194.60

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Solution

The fourth proportional to 78,809,343.40, 118,214,015.10 and 66,338,194.60 is: 99,507,291.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,809,343.40 : 118,214,015.10 = 66,338,194.60 : x
  2. Step 2: Convert to fraction form
    78,809,343.40/118,214,015.10 = 66,338,194.60/x
  3. Step 3: Cross multiply
    78,809,343.40x = 118,214,015.10 × 66,338,194.60
  4. Step 4: Simplify right side
    78,809,343.40x = 7,842,104,338,151,138
  5. Step 5: Solve for x
    x = 7,842,104,338,151,138/78,809,343.40
  6. Step 6: Final answer
    x = 99,507,291.90

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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.