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Finding the Fourth Proportional to 139,929,601.67, 193,108,690.67 and 77,209,768.29

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Solution

The fourth proportional to 139,929,601.67, 193,108,690.67 and 77,209,768.29 is: 106,552,702.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,929,601.67 : 193,108,690.67 = 77,209,768.29 : x
  2. Step 2: Convert to fraction form
    139,929,601.67/193,108,690.67 = 77,209,768.29/x
  3. Step 3: Cross multiply
    139,929,601.67x = 193,108,690.67 × 77,209,768.29
  4. Step 4: Simplify right side
    139,929,601.67x = 14,909,877,261,029,936
  5. Step 5: Solve for x
    x = 14,909,877,261,029,936/139,929,601.67
  6. Step 6: Final answer
    x = 106,552,702.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.