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Finding the Fourth Proportional to 85,503.42, 128,224.38 and 29,328.96

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Solution

The fourth proportional to 85,503.42, 128,224.38 and 29,328.96 is: 43,982.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,503.42 : 128,224.38 = 29,328.96 : x
  2. Step 2: Convert to fraction form
    85,503.42/128,224.38 = 29,328.96/x
  3. Step 3: Cross multiply
    85,503.42x = 128,224.38 × 29,328.96
  4. Step 4: Simplify right side
    85,503.42x = 3,760,687,818.51
  5. Step 5: Solve for x
    x = 3,760,687,818.51/85,503.42
  6. Step 6: Final answer
    x = 43,982.89

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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.