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Finding the Fourth Proportional to 172,271.40, 258,407.10 and 132,905.40

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Solution

The fourth proportional to 172,271.40, 258,407.10 and 132,905.40 is: 199,358.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,271.40 : 258,407.10 = 132,905.40 : x
  2. Step 2: Convert to fraction form
    172,271.40/258,407.10 = 132,905.40/x
  3. Step 3: Cross multiply
    172,271.40x = 258,407.10 × 132,905.40
  4. Step 4: Simplify right side
    172,271.40x = 34,343,698,988.34
  5. Step 5: Solve for x
    x = 34,343,698,988.34/172,271.40
  6. Step 6: Final answer
    x = 199,358.10

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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.