Home / 128,790,503.80-193,185,755.70-77,134,438.60

Finding the Fourth Proportional to 128,790,503.80, 193,185,755.70 and 77,134,438.60

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Solution

The fourth proportional to 128,790,503.80, 193,185,755.70 and 77,134,438.60 is: 115,701,657.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,790,503.80 : 193,185,755.70 = 77,134,438.60 : x
  2. Step 2: Convert to fraction form
    128,790,503.80/193,185,755.70 = 77,134,438.60/x
  3. Step 3: Cross multiply
    128,790,503.80x = 193,185,755.70 × 77,134,438.60
  4. Step 4: Simplify right side
    128,790,503.80x = 14,901,274,811,436,248
  5. Step 5: Solve for x
    x = 14,901,274,811,436,248/128,790,503.80
  6. Step 6: Final answer
    x = 115,701,657.90

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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.