Home / 128,500.04-177,330.42-71,907.08

Finding the Fourth Proportional to 128,500.04, 177,330.42 and 71,907.08

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Solution

The fourth proportional to 128,500.04, 177,330.42 and 71,907.08 is: 99,231.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,500.04 : 177,330.42 = 71,907.08 : x
  2. Step 2: Convert to fraction form
    128,500.04/177,330.42 = 71,907.08/x
  3. Step 3: Cross multiply
    128,500.04x = 177,330.42 × 71,907.08
  4. Step 4: Simplify right side
    128,500.04x = 12,751,312,697.37
  5. Step 5: Solve for x
    x = 12,751,312,697.37/128,500.04
  6. Step 6: Final answer
    x = 99,231.97

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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.