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Finding the Fourth Proportional to 172,055.40, 258,044.40 and 72,328.20

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Solution

The fourth proportional to 172,055.40, 258,044.40 and 72,328.20 is: 108,476.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,055.40 : 258,044.40 = 72,328.20 : x
  2. Step 2: Convert to fraction form
    172,055.40/258,044.40 = 72,328.20/x
  3. Step 3: Cross multiply
    172,055.40x = 258,044.40 × 72,328.20
  4. Step 4: Simplify right side
    172,055.40x = 18,663,886,972.08
  5. Step 5: Solve for x
    x = 18,663,886,972.08/172,055.40
  6. Step 6: Final answer
    x = 108,476.03

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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.