Home / 81,352.16-121,981.50-43,354.64

Finding the Fourth Proportional to 81,352.16, 121,981.50 and 43,354.64

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Solution

The fourth proportional to 81,352.16, 121,981.50 and 43,354.64 is: 65,007.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,352.16 : 121,981.50 = 43,354.64 : x
  2. Step 2: Convert to fraction form
    81,352.16/121,981.50 = 43,354.64/x
  3. Step 3: Cross multiply
    81,352.16x = 121,981.50 × 43,354.64
  4. Step 4: Simplify right side
    81,352.16x = 5,288,463,409.25
  5. Step 5: Solve for x
    x = 5,288,463,409.25/81,352.16
  6. Step 6: Final answer
    x = 65,007.05

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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.