Home / 128,916.01-177,900.67-71,555.16

Finding the Fourth Proportional to 128,916.01, 177,900.67 and 71,555.16

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Solution

The fourth proportional to 128,916.01, 177,900.67 and 71,555.16 is: 98,744.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,916.01 : 177,900.67 = 71,555.16 : x
  2. Step 2: Convert to fraction form
    128,916.01/177,900.67 = 71,555.16/x
  3. Step 3: Cross multiply
    128,916.01x = 177,900.67 × 71,555.16
  4. Step 4: Simplify right side
    128,916.01x = 12,729,711,662.53
  5. Step 5: Solve for x
    x = 12,729,711,662.53/128,916.01
  6. Step 6: Final answer
    x = 98,744.23

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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.