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Finding the Fourth Proportional to 172,208.40, 258,059.88 and 122,384.40

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Solution

The fourth proportional to 172,208.40, 258,059.88 and 122,384.40 is: 183,397.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,208.40 : 258,059.88 = 122,384.40 : x
  2. Step 2: Convert to fraction form
    172,208.40/258,059.88 = 122,384.40/x
  3. Step 3: Cross multiply
    172,208.40x = 258,059.88 × 122,384.40
  4. Step 4: Simplify right side
    172,208.40x = 31,582,503,577.87
  5. Step 5: Solve for x
    x = 31,582,503,577.87/172,208.40
  6. Step 6: Final answer
    x = 183,397.00

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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.