Home / 81,324.81-121,346.30-72,445.59

Finding the Fourth Proportional to 81,324.81, 121,346.30 and 72,445.59

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Solution

The fourth proportional to 81,324.81, 121,346.30 and 72,445.59 is: 108,097.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,324.81 : 121,346.30 = 72,445.59 : x
  2. Step 2: Convert to fraction form
    81,324.81/121,346.30 = 72,445.59/x
  3. Step 3: Cross multiply
    81,324.81x = 121,346.30 × 72,445.59
  4. Step 4: Simplify right side
    81,324.81x = 8,791,004,478.93
  5. Step 5: Solve for x
    x = 8,791,004,478.93/81,324.81
  6. Step 6: Final answer
    x = 108,097.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.