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Finding the Fourth Proportional to 67,017.60, 100,603.20 and 39,331.20

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Solution

The fourth proportional to 67,017.60, 100,603.20 and 39,331.20 is: 59,041.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,017.60 : 100,603.20 = 39,331.20 : x
  2. Step 2: Convert to fraction form
    67,017.60/100,603.20 = 39,331.20/x
  3. Step 3: Cross multiply
    67,017.60x = 100,603.20 × 39,331.20
  4. Step 4: Simplify right side
    67,017.60x = 3,956,844,579.84
  5. Step 5: Solve for x
    x = 3,956,844,579.84/67,017.60
  6. Step 6: Final answer
    x = 59,041.87

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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.