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Finding the Fourth Proportional to 125,208, 172,787.04 and 72,216

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Solution

The fourth proportional to 125,208, 172,787.04 and 72,216 is: 99,658.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,208 : 172,787.04 = 72,216 : x
  2. Step 2: Convert to fraction form
    125,208/172,787.04 = 72,216/x
  3. Step 3: Cross multiply
    125,208x = 172,787.04 × 72,216
  4. Step 4: Simplify right side
    125,208x = 12,477,988,880.64
  5. Step 5: Solve for x
    x = 12,477,988,880.64/125,208
  6. Step 6: Final answer
    x = 99,658.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.