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Finding the Fourth Proportional to 66,489.90, 99,734.04 and 19,106.10

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Solution

The fourth proportional to 66,489.90, 99,734.04 and 19,106.10 is: 28,658.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,489.90 : 99,734.04 = 19,106.10 : x
  2. Step 2: Convert to fraction form
    66,489.90/99,734.04 = 19,106.10/x
  3. Step 3: Cross multiply
    66,489.90x = 99,734.04 × 19,106.10
  4. Step 4: Simplify right side
    66,489.90x = 1,905,528,541.64
  5. Step 5: Solve for x
    x = 1,905,528,541.64/66,489.90
  6. Step 6: Final answer
    x = 28,658.92

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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.