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Finding the Fourth Proportional to 128,681.76, 193,031.10 and 44,450.04

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Solution

The fourth proportional to 128,681.76, 193,031.10 and 44,450.04 is: 66,677.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,681.76 : 193,031.10 = 44,450.04 : x
  2. Step 2: Convert to fraction form
    128,681.76/193,031.10 = 44,450.04/x
  3. Step 3: Cross multiply
    128,681.76x = 193,031.10 × 44,450.04
  4. Step 4: Simplify right side
    128,681.76x = 8,580,240,116.24
  5. Step 5: Solve for x
    x = 8,580,240,116.24/128,681.76
  6. Step 6: Final answer
    x = 66,677.98

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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.