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Finding the Fourth Proportional to 172,133.80, 258,071.10 and 72,212.20

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Solution

The fourth proportional to 172,133.80, 258,071.10 and 72,212.20 is: 108,263.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,133.80 : 258,071.10 = 72,212.20 : x
  2. Step 2: Convert to fraction form
    172,133.80/258,071.10 = 72,212.20/x
  3. Step 3: Cross multiply
    172,133.80x = 258,071.10 × 72,212.20
  4. Step 4: Simplify right side
    172,133.80x = 18,635,881,887.42
  5. Step 5: Solve for x
    x = 18,635,881,887.42/172,133.80
  6. Step 6: Final answer
    x = 108,263.93

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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.