Home / 136,931.63-188,964.35-76,512.68

Finding the Fourth Proportional to 136,931.63, 188,964.35 and 76,512.68

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Solution

The fourth proportional to 136,931.63, 188,964.35 and 76,512.68 is: 105,586.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,931.63 : 188,964.35 = 76,512.68 : x
  2. Step 2: Convert to fraction form
    136,931.63/188,964.35 = 76,512.68/x
  3. Step 3: Cross multiply
    136,931.63x = 188,964.35 × 76,512.68
  4. Step 4: Simplify right side
    136,931.63x = 14,458,168,089.42
  5. Step 5: Solve for x
    x = 14,458,168,089.42/136,931.63
  6. Step 6: Final answer
    x = 105,586.77

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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.