Home / 100,499.40-138,692.88-55,176.98

Finding the Fourth Proportional to 100,499.40, 138,692.88 and 55,176.98

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Solution

The fourth proportional to 100,499.40, 138,692.88 and 55,176.98 is: 76,146.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,499.40 : 138,692.88 = 55,176.98 : x
  2. Step 2: Convert to fraction form
    100,499.40/138,692.88 = 55,176.98/x
  3. Step 3: Cross multiply
    100,499.40x = 138,692.88 × 55,176.98
  4. Step 4: Simplify right side
    100,499.40x = 7,652,654,743.71
  5. Step 5: Solve for x
    x = 7,652,654,743.71/100,499.40
  6. Step 6: Final answer
    x = 76,146.27

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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.