Home / 128,482,395.60-192,788,911.80-85,381,582.80

Finding the Fourth Proportional to 128,482,395.60, 192,788,911.80 and 85,381,582.80

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Solution

The fourth proportional to 128,482,395.60, 192,788,911.80 and 85,381,582.80 is: 128,115,780.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,482,395.60 : 192,788,911.80 = 85,381,582.80 : x
  2. Step 2: Convert to fraction form
    128,482,395.60/192,788,911.80 = 85,381,582.80/x
  3. Step 3: Cross multiply
    128,482,395.60x = 192,788,911.80 × 85,381,582.80
  4. Step 4: Simplify right side
    128,482,395.60x = 16,460,622,435,773,598
  5. Step 5: Solve for x
    x = 16,460,622,435,773,598/128,482,395.60
  6. Step 6: Final answer
    x = 128,115,780.83

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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.