Home / 142,539.39-196,707.42-78,881.49

Finding the Fourth Proportional to 142,539.39, 196,707.42 and 78,881.49

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Solution

The fourth proportional to 142,539.39, 196,707.42 and 78,881.49 is: 108,858.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,539.39 : 196,707.42 = 78,881.49 : x
  2. Step 2: Convert to fraction form
    142,539.39/196,707.42 = 78,881.49/x
  3. Step 3: Cross multiply
    142,539.39x = 196,707.42 × 78,881.49
  4. Step 4: Simplify right side
    142,539.39x = 15,516,574,383.66
  5. Step 5: Solve for x
    x = 15,516,574,383.66/142,539.39
  6. Step 6: Final answer
    x = 108,858.15

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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.