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Finding the Fourth Proportional to 125,597.80, 188,615.40 and 66,548.80

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Solution

The fourth proportional to 125,597.80, 188,615.40 and 66,548.80 is: 99,939.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,597.80 : 188,615.40 = 66,548.80 : x
  2. Step 2: Convert to fraction form
    125,597.80/188,615.40 = 66,548.80/x
  3. Step 3: Cross multiply
    125,597.80x = 188,615.40 × 66,548.80
  4. Step 4: Simplify right side
    125,597.80x = 12,552,128,531.52
  5. Step 5: Solve for x
    x = 12,552,128,531.52/125,597.80
  6. Step 6: Final answer
    x = 99,939.08

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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.