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Finding the Fourth Proportional to 172,017.92, 257,894.40 and 53,619.20

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Solution

The fourth proportional to 172,017.92, 257,894.40 and 53,619.20 is: 80,387.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,017.92 : 257,894.40 = 53,619.20 : x
  2. Step 2: Convert to fraction form
    172,017.92/257,894.40 = 53,619.20/x
  3. Step 3: Cross multiply
    172,017.92x = 257,894.40 × 53,619.20
  4. Step 4: Simplify right side
    172,017.92x = 13,828,091,412.48
  5. Step 5: Solve for x
    x = 13,828,091,412.48/172,017.92
  6. Step 6: Final answer
    x = 80,387.51

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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.