Home / 128,309,991.60-192,463,237.80-42,051,212.40

Finding the Fourth Proportional to 128,309,991.60, 192,463,237.80 and 42,051,212.40

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Solution

The fourth proportional to 128,309,991.60, 192,463,237.80 and 42,051,212.40 is: 63,076,245.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,309,991.60 : 192,463,237.80 = 42,051,212.40 : x
  2. Step 2: Convert to fraction form
    128,309,991.60/192,463,237.80 = 42,051,212.40/x
  3. Step 3: Cross multiply
    128,309,991.60x = 192,463,237.80 × 42,051,212.40
  4. Step 4: Simplify right side
    128,309,991.60x = 8,093,312,491,919,509
  5. Step 5: Solve for x
    x = 8,093,312,491,919,509/128,309,991.60
  6. Step 6: Final answer
    x = 63,076,245.20

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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.