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Finding the Fourth Proportional to 67,616.80, 101,403.60 and 28,164.40

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Solution

The fourth proportional to 67,616.80, 101,403.60 and 28,164.40 is: 42,237.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,616.80 : 101,403.60 = 28,164.40 : x
  2. Step 2: Convert to fraction form
    67,616.80/101,403.60 = 28,164.40/x
  3. Step 3: Cross multiply
    67,616.80x = 101,403.60 × 28,164.40
  4. Step 4: Simplify right side
    67,616.80x = 2,855,971,551.84
  5. Step 5: Solve for x
    x = 2,855,971,551.84/67,616.80
  6. Step 6: Final answer
    x = 42,237.60

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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.