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Finding the Fourth Proportional to 66,904.40, 100,248.06 and 35,312.78

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Solution

The fourth proportional to 66,904.40, 100,248.06 and 35,312.78 is: 52,911.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,904.40 : 100,248.06 = 35,312.78 : x
  2. Step 2: Convert to fraction form
    66,904.40/100,248.06 = 35,312.78/x
  3. Step 3: Cross multiply
    66,904.40x = 100,248.06 × 35,312.78
  4. Step 4: Simplify right side
    66,904.40x = 3,540,037,688.21
  5. Step 5: Solve for x
    x = 3,540,037,688.21/66,904.40
  6. Step 6: Final answer
    x = 52,911.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.