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Finding the Fourth Proportional to 123,072.50, 169,840.05 and 66,483.88

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Solution

The fourth proportional to 123,072.50, 169,840.05 and 66,483.88 is: 91,747.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,072.50 : 169,840.05 = 66,483.88 : x
  2. Step 2: Convert to fraction form
    123,072.50/169,840.05 = 66,483.88/x
  3. Step 3: Cross multiply
    123,072.50x = 169,840.05 × 66,483.88
  4. Step 4: Simplify right side
    123,072.50x = 11,291,625,503.39
  5. Step 5: Solve for x
    x = 11,291,625,503.39/123,072.50
  6. Step 6: Final answer
    x = 91,747.75

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1.5x scale

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.