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Finding the Fourth Proportional to 85,767.59, 128,599.29 and 38,373.86

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Solution

The fourth proportional to 85,767.59, 128,599.29 and 38,373.86 is: 57,537.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,767.59 : 128,599.29 = 38,373.86 : x
  2. Step 2: Convert to fraction form
    85,767.59/128,599.29 = 38,373.86/x
  3. Step 3: Cross multiply
    85,767.59x = 128,599.29 × 38,373.86
  4. Step 4: Simplify right side
    85,767.59x = 4,934,850,829.06
  5. Step 5: Solve for x
    x = 4,934,850,829.06/85,767.59
  6. Step 6: Final answer
    x = 57,537.48

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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.