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Finding the Fourth Proportional to 125,064, 172,588.32 and 68,475.78

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Solution

The fourth proportional to 125,064, 172,588.32 and 68,475.78 is: 94,496.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,064 : 172,588.32 = 68,475.78 : x
  2. Step 2: Convert to fraction form
    125,064/172,588.32 = 68,475.78/x
  3. Step 3: Cross multiply
    125,064x = 172,588.32 × 68,475.78
  4. Step 4: Simplify right side
    125,064x = 11,818,119,830.89
  5. Step 5: Solve for x
    x = 11,818,119,830.89/125,064
  6. Step 6: Final answer
    x = 94,496.58

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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.