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Finding the Fourth Proportional to 77,688,473.55, 108,562,309.05 and 77,688,473.55

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Solution

The fourth proportional to 77,688,473.55, 108,562,309.05 and 77,688,473.55 is: 108,562,309.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,688,473.55 : 108,562,309.05 = 77,688,473.55 : x
  2. Step 2: Convert to fraction form
    77,688,473.55/108,562,309.05 = 77,688,473.55/x
  3. Step 3: Cross multiply
    77,688,473.55x = 108,562,309.05 × 77,688,473.55
  4. Step 4: Simplify right side
    77,688,473.55x = 8,434,040,075,157,850
  5. Step 5: Solve for x
    x = 8,434,040,075,157,850/77,688,473.55
  6. Step 6: Final answer
    x = 108,562,309.05

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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.