Home / 136,601.40-188,509.12-76,172.76

Finding the Fourth Proportional to 136,601.40, 188,509.12 and 76,172.76

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Solution

The fourth proportional to 136,601.40, 188,509.12 and 76,172.76 is: 105,117.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,601.40 : 188,509.12 = 76,172.76 : x
  2. Step 2: Convert to fraction form
    136,601.40/188,509.12 = 76,172.76/x
  3. Step 3: Cross multiply
    136,601.40x = 188,509.12 × 76,172.76
  4. Step 4: Simplify right side
    136,601.40x = 14,359,259,955.57
  5. Step 5: Solve for x
    x = 14,359,259,955.57/136,601.40
  6. Step 6: Final answer
    x = 105,117.96

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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.