Home / 128,312,999.40-192,469,499.10-42,030,600.60

Finding the Fourth Proportional to 128,312,999.40, 192,469,499.10 and 42,030,600.60

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Solution

The fourth proportional to 128,312,999.40, 192,469,499.10 and 42,030,600.60 is: 63,045,900.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,312,999.40 : 192,469,499.10 = 42,030,600.60 : x
  2. Step 2: Convert to fraction form
    128,312,999.40/192,469,499.10 = 42,030,600.60/x
  3. Step 3: Cross multiply
    128,312,999.40x = 192,469,499.10 × 42,030,600.60
  4. Step 4: Simplify right side
    128,312,999.40x = 8,089,608,644,354,159
  5. Step 5: Solve for x
    x = 8,089,608,644,354,159/128,312,999.40
  6. Step 6: Final answer
    x = 63,045,900.90

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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.