Home / 128,720,317.80-193,089,807.90-77,492,029.80

Finding the Fourth Proportional to 128,720,317.80, 193,089,807.90 and 77,492,029.80

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Solution

The fourth proportional to 128,720,317.80, 193,089,807.90 and 77,492,029.80 is: 116,243,662.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,720,317.80 : 193,089,807.90 = 77,492,029.80 : x
  2. Step 2: Convert to fraction form
    128,720,317.80/193,089,807.90 = 77,492,029.80/x
  3. Step 3: Cross multiply
    128,720,317.80x = 193,089,807.90 × 77,492,029.80
  4. Step 4: Simplify right side
    128,720,317.80x = 14,962,921,147,863,076
  5. Step 5: Solve for x
    x = 14,962,921,147,863,076/128,720,317.80
  6. Step 6: Final answer
    x = 116,243,662.26

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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.