Home / 136,988.14-189,042.98-76,558.72

Finding the Fourth Proportional to 136,988.14, 189,042.98 and 76,558.72

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Solution

The fourth proportional to 136,988.14, 189,042.98 and 76,558.72 is: 105,650.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,988.14 : 189,042.98 = 76,558.72 : x
  2. Step 2: Convert to fraction form
    136,988.14/189,042.98 = 76,558.72/x
  3. Step 3: Cross multiply
    136,988.14x = 189,042.98 × 76,558.72
  4. Step 4: Simplify right side
    136,988.14x = 14,472,887,628.57
  5. Step 5: Solve for x
    x = 14,472,887,628.57/136,988.14
  6. Step 6: Final answer
    x = 105,650.67

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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.