Home / 136,521.28-188,366.40-76,905.28

Finding the Fourth Proportional to 136,521.28, 188,366.40 and 76,905.28

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Solution

The fourth proportional to 136,521.28, 188,366.40 and 76,905.28 is: 106,110.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,521.28 : 188,366.40 = 76,905.28 : x
  2. Step 2: Convert to fraction form
    136,521.28/188,366.40 = 76,905.28/x
  3. Step 3: Cross multiply
    136,521.28x = 188,366.40 × 76,905.28
  4. Step 4: Simplify right side
    136,521.28x = 14,486,370,734.59
  5. Step 5: Solve for x
    x = 14,486,370,734.59/136,521.28
  6. Step 6: Final answer
    x = 106,110.72

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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.