Home / 142,224.16-196,256.64-81,778.72

Finding the Fourth Proportional to 142,224.16, 196,256.64 and 81,778.72

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Solution

The fourth proportional to 142,224.16, 196,256.64 and 81,778.72 is: 112,847.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,224.16 : 196,256.64 = 81,778.72 : x
  2. Step 2: Convert to fraction form
    142,224.16/196,256.64 = 81,778.72/x
  3. Step 3: Cross multiply
    142,224.16x = 196,256.64 × 81,778.72
  4. Step 4: Simplify right side
    142,224.16x = 16,049,616,810.70
  5. Step 5: Solve for x
    x = 16,049,616,810.70/142,224.16
  6. Step 6: Final answer
    x = 112,847.33

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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.