Home / 128,057.10-192,114.45-39,314.70

Finding the Fourth Proportional to 128,057.10, 192,114.45 and 39,314.70

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Solution

The fourth proportional to 128,057.10, 192,114.45 and 39,314.70 is: 58,980.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,057.10 : 192,114.45 = 39,314.70 : x
  2. Step 2: Convert to fraction form
    128,057.10/192,114.45 = 39,314.70/x
  3. Step 3: Cross multiply
    128,057.10x = 192,114.45 × 39,314.70
  4. Step 4: Simplify right side
    128,057.10x = 7,552,921,967.42
  5. Step 5: Solve for x
    x = 7,552,921,967.42/128,057.10
  6. Step 6: Final answer
    x = 58,980.89

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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.