Home / 142,388.73-196,500.51-78,730.65

Finding the Fourth Proportional to 142,388.73, 196,500.51 and 78,730.65

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Solution

The fourth proportional to 142,388.73, 196,500.51 and 78,730.65 is: 108,650.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,388.73 : 196,500.51 = 78,730.65 : x
  2. Step 2: Convert to fraction form
    142,388.73/196,500.51 = 78,730.65/x
  3. Step 3: Cross multiply
    142,388.73x = 196,500.51 × 78,730.65
  4. Step 4: Simplify right side
    142,388.73x = 15,470,612,877.63
  5. Step 5: Solve for x
    x = 15,470,612,877.63/142,388.73
  6. Step 6: Final answer
    x = 108,650.54

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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.