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Finding the Fourth Proportional to 218,630.77, 301,785.96 and 128,015.87

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Solution

The fourth proportional to 218,630.77, 301,785.96 and 128,015.87 is: 176,706.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,630.77 : 301,785.96 = 128,015.87 : x
  2. Step 2: Convert to fraction form
    218,630.77/301,785.96 = 128,015.87/x
  3. Step 3: Cross multiply
    218,630.77x = 301,785.96 × 128,015.87
  4. Step 4: Simplify right side
    218,630.77x = 38,633,391,194.31
  5. Step 5: Solve for x
    x = 38,633,391,194.31/218,630.77
  6. Step 6: Final answer
    x = 176,706.10

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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.