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Finding the Fourth Proportional to 172,118.90, 258,178.35 and 53,802.20

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Solution

The fourth proportional to 172,118.90, 258,178.35 and 53,802.20 is: 80,703.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,118.90 : 258,178.35 = 53,802.20 : x
  2. Step 2: Convert to fraction form
    172,118.90/258,178.35 = 53,802.20/x
  3. Step 3: Cross multiply
    172,118.90x = 258,178.35 × 53,802.20
  4. Step 4: Simplify right side
    172,118.90x = 13,890,563,222.37
  5. Step 5: Solve for x
    x = 13,890,563,222.37/172,118.90
  6. Step 6: Final answer
    x = 80,703.30

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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.