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Finding the Fourth Proportional to 136,031.94, 204,368.08 and 128,479.10

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Solution

The fourth proportional to 136,031.94, 204,368.08 and 128,479.10 is: 193,021.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,031.94 : 204,368.08 = 128,479.10 : x
  2. Step 2: Convert to fraction form
    136,031.94/204,368.08 = 128,479.10/x
  3. Step 3: Cross multiply
    136,031.94x = 204,368.08 × 128,479.10
  4. Step 4: Simplify right side
    136,031.94x = 26,257,026,987.13
  5. Step 5: Solve for x
    x = 26,257,026,987.13/136,031.94
  6. Step 6: Final answer
    x = 193,021.04

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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.