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Finding the Fourth Proportional to 253,999.45, 380,732.47 and 85,461.27

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Solution

The fourth proportional to 253,999.45, 380,732.47 and 85,461.27 is: 128,102.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,999.45 : 380,732.47 = 85,461.27 : x
  2. Step 2: Convert to fraction form
    253,999.45/380,732.47 = 85,461.27/x
  3. Step 3: Cross multiply
    253,999.45x = 380,732.47 × 85,461.27
  4. Step 4: Simplify right side
    253,999.45x = 32,537,878,299.12
  5. Step 5: Solve for x
    x = 32,537,878,299.12/253,999.45
  6. Step 6: Final answer
    x = 128,102.16

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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.