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Finding the Fourth Proportional to 139,978,742.60, 209,968,113.90 and 111,068,352.20

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Solution

The fourth proportional to 139,978,742.60, 209,968,113.90 and 111,068,352.20 is: 166,602,528.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,978,742.60 : 209,968,113.90 = 111,068,352.20 : x
  2. Step 2: Convert to fraction form
    139,978,742.60/209,968,113.90 = 111,068,352.20/x
  3. Step 3: Cross multiply
    139,978,742.60x = 209,968,113.90 × 111,068,352.20
  4. Step 4: Simplify right side
    139,978,742.60x = 23,320,812,425,414,916
  5. Step 5: Solve for x
    x = 23,320,812,425,414,916/139,978,742.60
  6. Step 6: Final answer
    x = 166,602,528.30

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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.