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Finding the Fourth Proportional to 220,810.64, 331,271.12 and 87,646.88

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Solution

The fourth proportional to 220,810.64, 331,271.12 and 87,646.88 is: 131,492.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,810.64 : 331,271.12 = 87,646.88 : x
  2. Step 2: Convert to fraction form
    220,810.64/331,271.12 = 87,646.88/x
  3. Step 3: Cross multiply
    220,810.64x = 331,271.12 × 87,646.88
  4. Step 4: Simplify right side
    220,810.64x = 29,034,880,102.11
  5. Step 5: Solve for x
    x = 29,034,880,102.11/220,810.64
  6. Step 6: Final answer
    x = 131,492.21

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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.