Home / 142,401.22-196,498.64-78,728.74

Finding the Fourth Proportional to 142,401.22, 196,498.64 and 78,728.74

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Solution

The fourth proportional to 142,401.22, 196,498.64 and 78,728.74 is: 108,637.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,401.22 : 196,498.64 = 78,728.74 : x
  2. Step 2: Convert to fraction form
    142,401.22/196,498.64 = 78,728.74/x
  3. Step 3: Cross multiply
    142,401.22x = 196,498.64 × 78,728.74
  4. Step 4: Simplify right side
    142,401.22x = 15,470,090,338.91
  5. Step 5: Solve for x
    x = 15,470,090,338.91/142,401.22
  6. Step 6: Final answer
    x = 108,637.34

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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.