Home / 51,128.60-70,555.74-28,768.28

Finding the Fourth Proportional to 51,128.60, 70,555.74 and 28,768.28

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Solution

The fourth proportional to 51,128.60, 70,555.74 and 28,768.28 is: 39,699.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,128.60 : 70,555.74 = 28,768.28 : x
  2. Step 2: Convert to fraction form
    51,128.60/70,555.74 = 28,768.28/x
  3. Step 3: Cross multiply
    51,128.60x = 70,555.74 × 28,768.28
  4. Step 4: Simplify right side
    51,128.60x = 2,029,767,283.93
  5. Step 5: Solve for x
    x = 2,029,767,283.93/51,128.60
  6. Step 6: Final answer
    x = 39,699.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.