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Finding the Fourth Proportional to 208,088,896.80, 312,038,866.80 and 78,653,488.80

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Solution

The fourth proportional to 208,088,896.80, 312,038,866.80 and 78,653,488.80 is: 117,944,522.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,088,896.80 : 312,038,866.80 = 78,653,488.80 : x
  2. Step 2: Convert to fraction form
    208,088,896.80/312,038,866.80 = 78,653,488.80/x
  3. Step 3: Cross multiply
    208,088,896.80x = 312,038,866.80 × 78,653,488.80
  4. Step 4: Simplify right side
    208,088,896.80x = 24,542,945,515,018,492
  5. Step 5: Solve for x
    x = 24,542,945,515,018,492/208,088,896.80
  6. Step 6: Final answer
    x = 117,944,522.23

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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.