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Finding the Fourth Proportional to 133,137.98, 183,731.87 and 72,710.40

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Solution

The fourth proportional to 133,137.98, 183,731.87 and 72,710.40 is: 100,341.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,137.98 : 183,731.87 = 72,710.40 : x
  2. Step 2: Convert to fraction form
    133,137.98/183,731.87 = 72,710.40/x
  3. Step 3: Cross multiply
    133,137.98x = 183,731.87 × 72,710.40
  4. Step 4: Simplify right side
    133,137.98x = 13,359,217,760.45
  5. Step 5: Solve for x
    x = 13,359,217,760.45/133,137.98
  6. Step 6: Final answer
    x = 100,341.15

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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.