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Finding the Fourth Proportional to 139,443,764.80, 209,165,647.20 and 115,210,055.20

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Solution

The fourth proportional to 139,443,764.80, 209,165,647.20 and 115,210,055.20 is: 172,815,082.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,443,764.80 : 209,165,647.20 = 115,210,055.20 : x
  2. Step 2: Convert to fraction form
    139,443,764.80/209,165,647.20 = 115,210,055.20/x
  3. Step 3: Cross multiply
    139,443,764.80x = 209,165,647.20 × 115,210,055.20
  4. Step 4: Simplify right side
    139,443,764.80x = 24,097,985,759,855,724
  5. Step 5: Solve for x
    x = 24,097,985,759,855,724/139,443,764.80
  6. Step 6: Final answer
    x = 172,815,082.80

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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.