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Finding the Fourth Proportional to 125,009.31, 172,512.85 and 68,420.69

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Solution

The fourth proportional to 125,009.31, 172,512.85 and 68,420.69 is: 94,420.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,009.31 : 172,512.85 = 68,420.69 : x
  2. Step 2: Convert to fraction form
    125,009.31/172,512.85 = 68,420.69/x
  3. Step 3: Cross multiply
    125,009.31x = 172,512.85 × 68,420.69
  4. Step 4: Simplify right side
    125,009.31x = 11,803,448,230.87
  5. Step 5: Solve for x
    x = 11,803,448,230.87/125,009.31
  6. Step 6: Final answer
    x = 94,420.55

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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.