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Finding the Fourth Proportional to 67,657.20, 101,485.80 and 20,924.40

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Solution

The fourth proportional to 67,657.20, 101,485.80 and 20,924.40 is: 31,386.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,657.20 : 101,485.80 = 20,924.40 : x
  2. Step 2: Convert to fraction form
    67,657.20/101,485.80 = 20,924.40/x
  3. Step 3: Cross multiply
    67,657.20x = 101,485.80 × 20,924.40
  4. Step 4: Simplify right side
    67,657.20x = 2,123,529,473.52
  5. Step 5: Solve for x
    x = 2,123,529,473.52/67,657.20
  6. Step 6: Final answer
    x = 31,386.60

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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.