Home / 128,341.45-177,102.21-74,622.66

Finding the Fourth Proportional to 128,341.45, 177,102.21 and 74,622.66

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Solution

The fourth proportional to 128,341.45, 177,102.21 and 74,622.66 is: 102,974.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,341.45 : 177,102.21 = 74,622.66 : x
  2. Step 2: Convert to fraction form
    128,341.45/177,102.21 = 74,622.66/x
  3. Step 3: Cross multiply
    128,341.45x = 177,102.21 × 74,622.66
  4. Step 4: Simplify right side
    128,341.45x = 13,215,838,002.08
  5. Step 5: Solve for x
    x = 13,215,838,002.08/128,341.45
  6. Step 6: Final answer
    x = 102,974.04

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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.