Home / 142,582.79-196,743.65-78,920.43

Finding the Fourth Proportional to 142,582.79, 196,743.65 and 78,920.43

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Solution

The fourth proportional to 142,582.79, 196,743.65 and 78,920.43 is: 108,898.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,582.79 : 196,743.65 = 78,920.43 : x
  2. Step 2: Convert to fraction form
    142,582.79/196,743.65 = 78,920.43/x
  3. Step 3: Cross multiply
    142,582.79x = 196,743.65 × 78,920.43
  4. Step 4: Simplify right side
    142,582.79x = 15,527,093,457.77
  5. Step 5: Solve for x
    x = 15,527,093,457.77/142,582.79
  6. Step 6: Final answer
    x = 108,898.79

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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.