Home / 128,591.49-192,816.77-39,820.35

Finding the Fourth Proportional to 128,591.49, 192,816.77 and 39,820.35

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Solution

The fourth proportional to 128,591.49, 192,816.77 and 39,820.35 is: 59,708.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,591.49 : 192,816.77 = 39,820.35 : x
  2. Step 2: Convert to fraction form
    128,591.49/192,816.77 = 39,820.35/x
  3. Step 3: Cross multiply
    128,591.49x = 192,816.77 × 39,820.35
  4. Step 4: Simplify right side
    128,591.49x = 7,678,031,068.17
  5. Step 5: Solve for x
    x = 7,678,031,068.17/128,591.49
  6. Step 6: Final answer
    x = 59,708.70

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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.