Home / 142,518.89-196,673.27-78,856.69

Finding the Fourth Proportional to 142,518.89, 196,673.27 and 78,856.69

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Solution

The fourth proportional to 142,518.89, 196,673.27 and 78,856.69 is: 108,820.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,518.89 : 196,673.27 = 78,856.69 : x
  2. Step 2: Convert to fraction form
    142,518.89/196,673.27 = 78,856.69/x
  3. Step 3: Cross multiply
    142,518.89x = 196,673.27 × 78,856.69
  4. Step 4: Simplify right side
    142,518.89x = 15,509,002,566.47
  5. Step 5: Solve for x
    x = 15,509,002,566.47/142,518.89
  6. Step 6: Final answer
    x = 108,820.68

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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.