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Finding the Fourth Proportional to 172,021.80, 258,032.70 and 130,031.40

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Solution

The fourth proportional to 172,021.80, 258,032.70 and 130,031.40 is: 195,047.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,021.80 : 258,032.70 = 130,031.40 : x
  2. Step 2: Convert to fraction form
    172,021.80/258,032.70 = 130,031.40/x
  3. Step 3: Cross multiply
    172,021.80x = 258,032.70 × 130,031.40
  4. Step 4: Simplify right side
    172,021.80x = 33,552,353,226.78
  5. Step 5: Solve for x
    x = 33,552,353,226.78/172,021.80
  6. Step 6: Final answer
    x = 195,047.10

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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.