Home / 128,948.05-177,969.45-71,605.72

Finding the Fourth Proportional to 128,948.05, 177,969.45 and 71,605.72

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Solution

The fourth proportional to 128,948.05, 177,969.45 and 71,605.72 is: 98,827.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,948.05 : 177,969.45 = 71,605.72 : x
  2. Step 2: Convert to fraction form
    128,948.05/177,969.45 = 71,605.72/x
  3. Step 3: Cross multiply
    128,948.05x = 177,969.45 × 71,605.72
  4. Step 4: Simplify right side
    128,948.05x = 12,743,631,096.24
  5. Step 5: Solve for x
    x = 12,743,631,096.24/128,948.05
  6. Step 6: Final answer
    x = 98,827.64

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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.