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Finding the Fourth Proportional to 72,692.20, 109,038.30 and 72,231.40

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Solution

The fourth proportional to 72,692.20, 109,038.30 and 72,231.40 is: 108,347.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,692.20 : 109,038.30 = 72,231.40 : x
  2. Step 2: Convert to fraction form
    72,692.20/109,038.30 = 72,231.40/x
  3. Step 3: Cross multiply
    72,692.20x = 109,038.30 × 72,231.40
  4. Step 4: Simplify right side
    72,692.20x = 7,875,989,062.62
  5. Step 5: Solve for x
    x = 7,875,989,062.62/72,692.20
  6. Step 6: Final answer
    x = 108,347.10

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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.