Home / 128,923.38-177,911.46-71,559.32

Finding the Fourth Proportional to 128,923.38, 177,911.46 and 71,559.32

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Solution

The fourth proportional to 128,923.38, 177,911.46 and 71,559.32 is: 98,750.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,923.38 : 177,911.46 = 71,559.32 : x
  2. Step 2: Convert to fraction form
    128,923.38/177,911.46 = 71,559.32/x
  3. Step 3: Cross multiply
    128,923.38x = 177,911.46 × 71,559.32
  4. Step 4: Simplify right side
    128,923.38x = 12,731,223,097.81
  5. Step 5: Solve for x
    x = 12,731,223,097.81/128,923.38
  6. Step 6: Final answer
    x = 98,750.31

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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.