Home / 128,798.03-177,742.75-71,438.49

Finding the Fourth Proportional to 128,798.03, 177,742.75 and 71,438.49

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Solution

The fourth proportional to 128,798.03, 177,742.75 and 71,438.49 is: 98,585.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,798.03 : 177,742.75 = 71,438.49 : x
  2. Step 2: Convert to fraction form
    128,798.03/177,742.75 = 71,438.49/x
  3. Step 3: Cross multiply
    128,798.03x = 177,742.75 × 71,438.49
  4. Step 4: Simplify right side
    128,798.03x = 12,697,673,668.45
  5. Step 5: Solve for x
    x = 12,697,673,668.45/128,798.03
  6. Step 6: Final answer
    x = 98,585.93

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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.