Home / 128,431.87-177,271.60-74,727.26

Finding the Fourth Proportional to 128,431.87, 177,271.60 and 74,727.26

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Solution

The fourth proportional to 128,431.87, 177,271.60 and 74,727.26 is: 103,144.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,431.87 : 177,271.60 = 74,727.26 : x
  2. Step 2: Convert to fraction form
    128,431.87/177,271.60 = 74,727.26/x
  3. Step 3: Cross multiply
    128,431.87x = 177,271.60 × 74,727.26
  4. Step 4: Simplify right side
    128,431.87x = 13,247,020,943.82
  5. Step 5: Solve for x
    x = 13,247,020,943.82/128,431.87
  6. Step 6: Final answer
    x = 103,144.34

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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.