Home / 126,023.60-189,035.40-105,287.60

Finding the Fourth Proportional to 126,023.60, 189,035.40 and 105,287.60

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Solution

The fourth proportional to 126,023.60, 189,035.40 and 105,287.60 is: 157,931.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,023.60 : 189,035.40 = 105,287.60 : x
  2. Step 2: Convert to fraction form
    126,023.60/189,035.40 = 105,287.60/x
  3. Step 3: Cross multiply
    126,023.60x = 189,035.40 × 105,287.60
  4. Step 4: Simplify right side
    126,023.60x = 19,903,083,581.04
  5. Step 5: Solve for x
    x = 19,903,083,581.04/126,023.60
  6. Step 6: Final answer
    x = 157,931.40

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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.