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Finding the Fourth Proportional to 138,673,764.80, 208,010,647.20 and 98,362,980.80

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Solution

The fourth proportional to 138,673,764.80, 208,010,647.20 and 98,362,980.80 is: 147,544,471.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,673,764.80 : 208,010,647.20 = 98,362,980.80 : x
  2. Step 2: Convert to fraction form
    138,673,764.80/208,010,647.20 = 98,362,980.80/x
  3. Step 3: Cross multiply
    138,673,764.80x = 208,010,647.20 × 98,362,980.80
  4. Step 4: Simplify right side
    138,673,764.80x = 20,460,547,296,729,172
  5. Step 5: Solve for x
    x = 20,460,547,296,729,172/138,673,764.80
  6. Step 6: Final answer
    x = 147,544,471.20

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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.