Home / 128,557.10-192,507.60-102,313.10

Finding the Fourth Proportional to 128,557.10, 192,507.60 and 102,313.10

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Solution

The fourth proportional to 128,557.10, 192,507.60 and 102,313.10 is: 153,208.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,557.10 : 192,507.60 = 102,313.10 : x
  2. Step 2: Convert to fraction form
    128,557.10/192,507.60 = 102,313.10/x
  3. Step 3: Cross multiply
    128,557.10x = 192,507.60 × 102,313.10
  4. Step 4: Simplify right side
    128,557.10x = 19,696,049,329.56
  5. Step 5: Solve for x
    x = 19,696,049,329.56/128,557.10
  6. Step 6: Final answer
    x = 153,208.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.