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Finding the Fourth Proportional to 78,807,514.20, 110,075,428.20 and 78,807,514.20

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Solution

The fourth proportional to 78,807,514.20, 110,075,428.20 and 78,807,514.20 is: 110,075,428.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,807,514.20 : 110,075,428.20 = 78,807,514.20 : x
  2. Step 2: Convert to fraction form
    78,807,514.20/110,075,428.20 = 78,807,514.20/x
  3. Step 3: Cross multiply
    78,807,514.20x = 110,075,428.20 × 78,807,514.20
  4. Step 4: Simplify right side
    78,807,514.20x = 8,674,770,870,942,581
  5. Step 5: Solve for x
    x = 8,674,770,870,942,581/78,807,514.20
  6. Step 6: Final answer
    x = 110,075,428.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.