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Finding the Fourth Proportional to 139,980,657.60, 209,970,986.40 and 111,070,267.20

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Solution

The fourth proportional to 139,980,657.60, 209,970,986.40 and 111,070,267.20 is: 166,605,400.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,980,657.60 : 209,970,986.40 = 111,070,267.20 : x
  2. Step 2: Convert to fraction form
    139,980,657.60/209,970,986.40 = 111,070,267.20/x
  3. Step 3: Cross multiply
    139,980,657.60x = 209,970,986.40 × 111,070,267.20
  4. Step 4: Simplify right side
    139,980,657.60x = 23,321,533,563,695,568
  5. Step 5: Solve for x
    x = 23,321,533,563,695,568/139,980,657.60
  6. Step 6: Final answer
    x = 166,605,400.80

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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.