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Finding the Fourth Proportional to 136,903.20, 205,484.40 and 84,415.20

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Solution

The fourth proportional to 136,903.20, 205,484.40 and 84,415.20 is: 126,702.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,903.20 : 205,484.40 = 84,415.20 : x
  2. Step 2: Convert to fraction form
    136,903.20/205,484.40 = 84,415.20/x
  3. Step 3: Cross multiply
    136,903.20x = 205,484.40 × 84,415.20
  4. Step 4: Simplify right side
    136,903.20x = 17,346,006,722.88
  5. Step 5: Solve for x
    x = 17,346,006,722.88/136,903.20
  6. Step 6: Final answer
    x = 126,702.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.