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Finding the Fourth Proportional to 125,115.94, 172,623.81 and 70,665.21

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Solution

The fourth proportional to 125,115.94, 172,623.81 and 70,665.21 is: 97,497.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,115.94 : 172,623.81 = 70,665.21 : x
  2. Step 2: Convert to fraction form
    125,115.94/172,623.81 = 70,665.21/x
  3. Step 3: Cross multiply
    125,115.94x = 172,623.81 × 70,665.21
  4. Step 4: Simplify right side
    125,115.94x = 12,198,497,652.15
  5. Step 5: Solve for x
    x = 12,198,497,652.15/125,115.94
  6. Step 6: Final answer
    x = 97,497.55

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1.5x scale

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.