Home / 138,217.19-190,701.54-77,784.30

Finding the Fourth Proportional to 138,217.19, 190,701.54 and 77,784.30

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Solution

The fourth proportional to 138,217.19, 190,701.54 and 77,784.30 is: 107,320.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,217.19 : 190,701.54 = 77,784.30 : x
  2. Step 2: Convert to fraction form
    138,217.19/190,701.54 = 77,784.30/x
  3. Step 3: Cross multiply
    138,217.19x = 190,701.54 × 77,784.30
  4. Step 4: Simplify right side
    138,217.19x = 14,833,585,797.82
  5. Step 5: Solve for x
    x = 14,833,585,797.82/138,217.19
  6. Step 6: Final answer
    x = 107,320.85

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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.