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Finding the Fourth Proportional to 78,857,139.45, 118,285,709.18 and 78,857,139.45

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Solution

The fourth proportional to 78,857,139.45, 118,285,709.18 and 78,857,139.45 is: 118,285,709.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,857,139.45 : 118,285,709.18 = 78,857,139.45 : x
  2. Step 2: Convert to fraction form
    78,857,139.45/118,285,709.18 = 78,857,139.45/x
  3. Step 3: Cross multiply
    78,857,139.45x = 118,285,709.18 × 78,857,139.45
  4. Step 4: Simplify right side
    78,857,139.45x = 9,327,672,663,749,406
  5. Step 5: Solve for x
    x = 9,327,672,663,749,406/78,857,139.45
  6. Step 6: Final answer
    x = 118,285,709.18

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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.