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Finding the Fourth Proportional to 136,176.40, 204,045.90 and 128,303.20

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Solution

The fourth proportional to 136,176.40, 204,045.90 and 128,303.20 is: 192,248.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,176.40 : 204,045.90 = 128,303.20 : x
  2. Step 2: Convert to fraction form
    136,176.40/204,045.90 = 128,303.20/x
  3. Step 3: Cross multiply
    136,176.40x = 204,045.90 × 128,303.20
  4. Step 4: Simplify right side
    136,176.40x = 26,179,741,916.88
  5. Step 5: Solve for x
    x = 26,179,741,916.88/136,176.40
  6. Step 6: Final answer
    x = 192,248.74

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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.