Home / 128,719,780.80-193,089,002.40-77,491,492.80

Finding the Fourth Proportional to 128,719,780.80, 193,089,002.40 and 77,491,492.80

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Solution

The fourth proportional to 128,719,780.80, 193,089,002.40 and 77,491,492.80 is: 116,242,856.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,719,780.80 : 193,089,002.40 = 77,491,492.80 : x
  2. Step 2: Convert to fraction form
    128,719,780.80/193,089,002.40 = 77,491,492.80/x
  3. Step 3: Cross multiply
    128,719,780.80x = 193,089,002.40 × 77,491,492.80
  4. Step 4: Simplify right side
    128,719,780.80x = 14,962,755,039,238,782
  5. Step 5: Solve for x
    x = 14,962,755,039,238,782/128,719,780.80
  6. Step 6: Final answer
    x = 116,242,856.74

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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.