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Finding the Fourth Proportional to 172,122.56, 258,056.64 and 72,312.32

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Solution

The fourth proportional to 172,122.56, 258,056.64 and 72,312.32 is: 108,415.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,122.56 : 258,056.64 = 72,312.32 : x
  2. Step 2: Convert to fraction form
    172,122.56/258,056.64 = 72,312.32/x
  3. Step 3: Cross multiply
    172,122.56x = 258,056.64 × 72,312.32
  4. Step 4: Simplify right side
    172,122.56x = 18,660,674,329.80
  5. Step 5: Solve for x
    x = 18,660,674,329.80/172,122.56
  6. Step 6: Final answer
    x = 108,415.04

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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.