Home / 142,090.79-196,085.30-78,428.60

Finding the Fourth Proportional to 142,090.79, 196,085.30 and 78,428.60

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Solution

The fourth proportional to 142,090.79, 196,085.30 and 78,428.60 is: 108,231.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,090.79 : 196,085.30 = 78,428.60 : x
  2. Step 2: Convert to fraction form
    142,090.79/196,085.30 = 78,428.60/x
  3. Step 3: Cross multiply
    142,090.79x = 196,085.30 × 78,428.60
  4. Step 4: Simplify right side
    142,090.79x = 15,378,694,187.01
  5. Step 5: Solve for x
    x = 15,378,694,187.01/142,090.79
  6. Step 6: Final answer
    x = 108,231.47

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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.