Home / 128,482,392.60-192,788,907.30-85,381,579.80

Finding the Fourth Proportional to 128,482,392.60, 192,788,907.30 and 85,381,579.80

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Solution

The fourth proportional to 128,482,392.60, 192,788,907.30 and 85,381,579.80 is: 128,115,776.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,482,392.60 : 192,788,907.30 = 85,381,579.80 : x
  2. Step 2: Convert to fraction form
    128,482,392.60/192,788,907.30 = 85,381,579.80/x
  3. Step 3: Cross multiply
    128,482,392.60x = 192,788,907.30 × 85,381,579.80
  4. Step 4: Simplify right side
    128,482,392.60x = 16,460,621,473,189,752
  5. Step 5: Solve for x
    x = 16,460,621,473,189,752/128,482,392.60
  6. Step 6: Final answer
    x = 128,115,776.33

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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.