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Finding the Fourth Proportional to 172,398.20, 258,670.20 and 109,266.80

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Solution

The fourth proportional to 172,398.20, 258,670.20 and 109,266.80 is: 163,946.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,398.20 : 258,670.20 = 109,266.80 : x
  2. Step 2: Convert to fraction form
    172,398.20/258,670.20 = 109,266.80/x
  3. Step 3: Cross multiply
    172,398.20x = 258,670.20 × 109,266.80
  4. Step 4: Simplify right side
    172,398.20x = 28,264,065,009.36
  5. Step 5: Solve for x
    x = 28,264,065,009.36/172,398.20
  6. Step 6: Final answer
    x = 163,946.40

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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.