Home / 142,141.51-196,153.96-78,479.76

Finding the Fourth Proportional to 142,141.51, 196,153.96 and 78,479.76

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Solution

The fourth proportional to 142,141.51, 196,153.96 and 78,479.76 is: 108,301.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,141.51 : 196,153.96 = 78,479.76 : x
  2. Step 2: Convert to fraction form
    142,141.51/196,153.96 = 78,479.76/x
  3. Step 3: Cross multiply
    142,141.51x = 196,153.96 × 78,479.76
  4. Step 4: Simplify right side
    142,141.51x = 15,394,115,703.85
  5. Step 5: Solve for x
    x = 15,394,115,703.85/142,141.51
  6. Step 6: Final answer
    x = 108,301.34

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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.