Home / 92,889.28-128,170.56-55,172.80

Finding the Fourth Proportional to 92,889.28, 128,170.56 and 55,172.80

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Solution

The fourth proportional to 92,889.28, 128,170.56 and 55,172.80 is: 76,128.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,889.28 : 128,170.56 = 55,172.80 : x
  2. Step 2: Convert to fraction form
    92,889.28/128,170.56 = 55,172.80/x
  3. Step 3: Cross multiply
    92,889.28x = 128,170.56 × 55,172.80
  4. Step 4: Simplify right side
    92,889.28x = 7,071,528,672.77
  5. Step 5: Solve for x
    x = 7,071,528,672.77/92,889.28
  6. Step 6: Final answer
    x = 76,128.58

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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.