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Finding the Fourth Proportional to 281,818.72, 422,505.74 and 139,712.92

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Solution

The fourth proportional to 281,818.72, 422,505.74 and 139,712.92 is: 209,459.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,818.72 : 422,505.74 = 139,712.92 : x
  2. Step 2: Convert to fraction form
    281,818.72/422,505.74 = 139,712.92/x
  3. Step 3: Cross multiply
    281,818.72x = 422,505.74 × 139,712.92
  4. Step 4: Simplify right side
    281,818.72x = 59,029,510,652.16
  5. Step 5: Solve for x
    x = 59,029,510,652.16/281,818.72
  6. Step 6: Final answer
    x = 209,459.15

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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.