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Finding the Fourth Proportional to 125,330.60, 172,955.04 and 68,742.20

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Solution

The fourth proportional to 125,330.60, 172,955.04 and 68,742.20 is: 94,863.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,330.60 : 172,955.04 = 68,742.20 : x
  2. Step 2: Convert to fraction form
    125,330.60/172,955.04 = 68,742.20/x
  3. Step 3: Cross multiply
    125,330.60x = 172,955.04 × 68,742.20
  4. Step 4: Simplify right side
    125,330.60x = 11,889,309,950.69
  5. Step 5: Solve for x
    x = 11,889,309,950.69/125,330.60
  6. Step 6: Final answer
    x = 94,863.58

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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.