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Finding the Fourth Proportional to 67,285.60, 100,928.40 and 42,402.40

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Solution

The fourth proportional to 67,285.60, 100,928.40 and 42,402.40 is: 63,603.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,285.60 : 100,928.40 = 42,402.40 : x
  2. Step 2: Convert to fraction form
    67,285.60/100,928.40 = 42,402.40/x
  3. Step 3: Cross multiply
    67,285.60x = 100,928.40 × 42,402.40
  4. Step 4: Simplify right side
    67,285.60x = 4,279,606,388.16
  5. Step 5: Solve for x
    x = 4,279,606,388.16/67,285.60
  6. Step 6: Final answer
    x = 63,603.60

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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.