Home / 128,726,021.80-193,089,032.70-74,306,463.40

Finding the Fourth Proportional to 128,726,021.80, 193,089,032.70 and 74,306,463.40

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Solution

The fourth proportional to 128,726,021.80, 193,089,032.70 and 74,306,463.40 is: 111,459,695.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,726,021.80 : 193,089,032.70 = 74,306,463.40 : x
  2. Step 2: Convert to fraction form
    128,726,021.80/193,089,032.70 = 74,306,463.40/x
  3. Step 3: Cross multiply
    128,726,021.80x = 193,089,032.70 × 74,306,463.40
  4. Step 4: Simplify right side
    128,726,021.80x = 14,347,763,141,263,954
  5. Step 5: Solve for x
    x = 14,347,763,141,263,954/128,726,021.80
  6. Step 6: Final answer
    x = 111,459,695.10

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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.