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Finding the Fourth Proportional to 85,748.70, 128,602.26 and 35,801.66

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Solution

The fourth proportional to 85,748.70, 128,602.26 and 35,801.66 is: 53,693.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,748.70 : 128,602.26 = 35,801.66 : x
  2. Step 2: Convert to fraction form
    85,748.70/128,602.26 = 35,801.66/x
  3. Step 3: Cross multiply
    85,748.70x = 128,602.26 × 35,801.66
  4. Step 4: Simplify right side
    85,748.70x = 4,604,174,387.75
  5. Step 5: Solve for x
    x = 4,604,174,387.75/85,748.70
  6. Step 6: Final answer
    x = 53,693.81

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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.