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Finding the Fourth Proportional to 172,013.51, 258,000.21 and 45,663.57

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Solution

The fourth proportional to 172,013.51, 258,000.21 and 45,663.57 is: 68,490.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,013.51 : 258,000.21 = 45,663.57 : x
  2. Step 2: Convert to fraction form
    172,013.51/258,000.21 = 45,663.57/x
  3. Step 3: Cross multiply
    172,013.51x = 258,000.21 × 45,663.57
  4. Step 4: Simplify right side
    172,013.51x = 11,781,210,649.35
  5. Step 5: Solve for x
    x = 11,781,210,649.35/172,013.51
  6. Step 6: Final answer
    x = 68,490.03

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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.