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Finding the Fourth Proportional to 72,692.80, 109,039.20 and 72,001.60

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Solution

The fourth proportional to 72,692.80, 109,039.20 and 72,001.60 is: 108,002.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,692.80 : 109,039.20 = 72,001.60 : x
  2. Step 2: Convert to fraction form
    72,692.80/109,039.20 = 72,001.60/x
  3. Step 3: Cross multiply
    72,692.80x = 109,039.20 × 72,001.60
  4. Step 4: Simplify right side
    72,692.80x = 7,850,996,862.72
  5. Step 5: Solve for x
    x = 7,850,996,862.72/72,692.80
  6. Step 6: Final answer
    x = 108,002.40

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1.5x scale

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.