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Finding the Fourth Proportional to 43,407,581.60, 65,111,372.40 and 13,120,119.20

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Solution

The fourth proportional to 43,407,581.60, 65,111,372.40 and 13,120,119.20 is: 19,680,178.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,407,581.60 : 65,111,372.40 = 13,120,119.20 : x
  2. Step 2: Convert to fraction form
    43,407,581.60/65,111,372.40 = 13,120,119.20/x
  3. Step 3: Cross multiply
    43,407,581.60x = 65,111,372.40 × 13,120,119.20
  4. Step 4: Simplify right side
    43,407,581.60x = 854,268,967,163,590
  5. Step 5: Solve for x
    x = 854,268,967,163,590/43,407,581.60
  6. Step 6: Final answer
    x = 19,680,178.80

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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.