Home / 81,023.28-111,812.40-45,212.64

Finding the Fourth Proportional to 81,023.28, 111,812.40 and 45,212.64

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Solution

The fourth proportional to 81,023.28, 111,812.40 and 45,212.64 is: 62,393.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,023.28 : 111,812.40 = 45,212.64 : x
  2. Step 2: Convert to fraction form
    81,023.28/111,812.40 = 45,212.64/x
  3. Step 3: Cross multiply
    81,023.28x = 111,812.40 × 45,212.64
  4. Step 4: Simplify right side
    81,023.28x = 5,055,333,788.74
  5. Step 5: Solve for x
    x = 5,055,333,788.74/81,023.28
  6. Step 6: Final answer
    x = 62,393.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.