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Finding the Fourth Proportional to 70,405.12, 105,623.44 and 23,656.72

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Solution

The fourth proportional to 70,405.12, 105,623.44 and 23,656.72 is: 35,490.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,405.12 : 105,623.44 = 23,656.72 : x
  2. Step 2: Convert to fraction form
    70,405.12/105,623.44 = 23,656.72/x
  3. Step 3: Cross multiply
    70,405.12x = 105,623.44 × 23,656.72
  4. Step 4: Simplify right side
    70,405.12x = 2,498,704,145.52
  5. Step 5: Solve for x
    x = 2,498,704,145.52/70,405.12
  6. Step 6: Final answer
    x = 35,490.38

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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.