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Finding the Fourth Proportional to 100,923.50, 139,268.90 and 55,592.60

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Solution

The fourth proportional to 100,923.50, 139,268.90 and 55,592.60 is: 76,714.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,923.50 : 139,268.90 = 55,592.60 : x
  2. Step 2: Convert to fraction form
    100,923.50/139,268.90 = 55,592.60/x
  3. Step 3: Cross multiply
    100,923.50x = 139,268.90 × 55,592.60
  4. Step 4: Simplify right side
    100,923.50x = 7,742,319,692.78
  5. Step 5: Solve for x
    x = 7,742,319,692.78/100,923.50
  6. Step 6: Final answer
    x = 76,714.73

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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.