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Finding the Fourth Proportional to 85,887.76, 128,869.98 and 33,301.35

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Solution

The fourth proportional to 85,887.76, 128,869.98 and 33,301.35 is: 49,966.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,887.76 : 128,869.98 = 33,301.35 : x
  2. Step 2: Convert to fraction form
    85,887.76/128,869.98 = 33,301.35/x
  3. Step 3: Cross multiply
    85,887.76x = 128,869.98 × 33,301.35
  4. Step 4: Simplify right side
    85,887.76x = 4,291,544,308.47
  5. Step 5: Solve for x
    x = 4,291,544,308.47/85,887.76
  6. Step 6: Final answer
    x = 49,966.89

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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.