Home / 128,952.45-177,955-80,582.46

Finding the Fourth Proportional to 128,952.45, 177,955 and 80,582.46

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Solution

The fourth proportional to 128,952.45, 177,955 and 80,582.46 is: 111,204.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,952.45 : 177,955 = 80,582.46 : x
  2. Step 2: Convert to fraction form
    128,952.45/177,955 = 80,582.46/x
  3. Step 3: Cross multiply
    128,952.45x = 177,955 × 80,582.46
  4. Step 4: Simplify right side
    128,952.45x = 14,340,051,669.30
  5. Step 5: Solve for x
    x = 14,340,051,669.30/128,952.45
  6. Step 6: Final answer
    x = 111,204.18

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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.