Home / 105,256.54-145,256.12-57,512.84

Finding the Fourth Proportional to 105,256.54, 145,256.12 and 57,512.84

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Solution

The fourth proportional to 105,256.54, 145,256.12 and 57,512.84 is: 79,368.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,256.54 : 145,256.12 = 57,512.84 : x
  2. Step 2: Convert to fraction form
    105,256.54/145,256.12 = 57,512.84/x
  3. Step 3: Cross multiply
    105,256.54x = 145,256.12 × 57,512.84
  4. Step 4: Simplify right side
    105,256.54x = 8,354,091,988.58
  5. Step 5: Solve for x
    x = 8,354,091,988.58/105,256.54
  6. Step 6: Final answer
    x = 79,368.86

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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.