Home / 138,861.56-191,574.69-80,708.63

Finding the Fourth Proportional to 138,861.56, 191,574.69 and 80,708.63

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Solution

The fourth proportional to 138,861.56, 191,574.69 and 80,708.63 is: 111,346.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,861.56 : 191,574.69 = 80,708.63 : x
  2. Step 2: Convert to fraction form
    138,861.56/191,574.69 = 80,708.63/x
  3. Step 3: Cross multiply
    138,861.56x = 191,574.69 × 80,708.63
  4. Step 4: Simplify right side
    138,861.56x = 15,461,730,772.57
  5. Step 5: Solve for x
    x = 15,461,730,772.57/138,861.56
  6. Step 6: Final answer
    x = 111,346.37

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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.