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Finding the Fourth Proportional to 139,722,373.20, 209,583,559.80 and 138,765,779.40

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Solution

The fourth proportional to 139,722,373.20, 209,583,559.80 and 138,765,779.40 is: 208,148,669.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,722,373.20 : 209,583,559.80 = 138,765,779.40 : x
  2. Step 2: Convert to fraction form
    139,722,373.20/209,583,559.80 = 138,765,779.40/x
  3. Step 3: Cross multiply
    139,722,373.20x = 209,583,559.80 × 138,765,779.40
  4. Step 4: Simplify right side
    139,722,373.20x = 29,083,026,025,073,512
  5. Step 5: Solve for x
    x = 29,083,026,025,073,512/139,722,373.20
  6. Step 6: Final answer
    x = 208,148,669.10

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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.