Home / 128,336.80-192,505.20-39,582.40

Finding the Fourth Proportional to 128,336.80, 192,505.20 and 39,582.40

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Solution

The fourth proportional to 128,336.80, 192,505.20 and 39,582.40 is: 59,373.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,336.80 : 192,505.20 = 39,582.40 : x
  2. Step 2: Convert to fraction form
    128,336.80/192,505.20 = 39,582.40/x
  3. Step 3: Cross multiply
    128,336.80x = 192,505.20 × 39,582.40
  4. Step 4: Simplify right side
    128,336.80x = 7,619,817,828.48
  5. Step 5: Solve for x
    x = 7,619,817,828.48/128,336.80
  6. Step 6: Final answer
    x = 59,373.60

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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.