Home / 81,041.36-121,574.16-28,441.60

Finding the Fourth Proportional to 81,041.36, 121,574.16 and 28,441.60

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Solution

The fourth proportional to 81,041.36, 121,574.16 and 28,441.60 is: 42,666.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,041.36 : 121,574.16 = 28,441.60 : x
  2. Step 2: Convert to fraction form
    81,041.36/121,574.16 = 28,441.60/x
  3. Step 3: Cross multiply
    81,041.36x = 121,574.16 × 28,441.60
  4. Step 4: Simplify right side
    81,041.36x = 3,457,763,629.06
  5. Step 5: Solve for x
    x = 3,457,763,629.06/81,041.36
  6. Step 6: Final answer
    x = 42,666.65

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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.