Home / 128,456.80-192,555.60-58,386.40

Finding the Fourth Proportional to 128,456.80, 192,555.60 and 58,386.40

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Solution

The fourth proportional to 128,456.80, 192,555.60 and 58,386.40 is: 87,520.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,456.80 : 192,555.60 = 58,386.40 : x
  2. Step 2: Convert to fraction form
    128,456.80/192,555.60 = 58,386.40/x
  3. Step 3: Cross multiply
    128,456.80x = 192,555.60 × 58,386.40
  4. Step 4: Simplify right side
    128,456.80x = 11,242,628,283.84
  5. Step 5: Solve for x
    x = 11,242,628,283.84/128,456.80
  6. Step 6: Final answer
    x = 87,520.69

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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.