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Finding the Fourth Proportional to 65,871, 98,818.97 and 26,431.20

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Solution

The fourth proportional to 65,871, 98,818.97 and 26,431.20 is: 39,651.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,871 : 98,818.97 = 26,431.20 : x
  2. Step 2: Convert to fraction form
    65,871/98,818.97 = 26,431.20/x
  3. Step 3: Cross multiply
    65,871x = 98,818.97 × 26,431.20
  4. Step 4: Simplify right side
    65,871x = 2,611,903,827.71
  5. Step 5: Solve for x
    x = 2,611,903,827.71/65,871
  6. Step 6: Final answer
    x = 39,651.80

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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.