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Finding the Fourth Proportional to 85,427.88, 117,945.90 and 76,459.83

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Solution

The fourth proportional to 85,427.88, 117,945.90 and 76,459.83 is: 105,564.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,427.88 : 117,945.90 = 76,459.83 : x
  2. Step 2: Convert to fraction form
    85,427.88/117,945.90 = 76,459.83/x
  3. Step 3: Cross multiply
    85,427.88x = 117,945.90 × 76,459.83
  4. Step 4: Simplify right side
    85,427.88x = 9,018,123,463.20
  5. Step 5: Solve for x
    x = 9,018,123,463.20/85,427.88
  6. Step 6: Final answer
    x = 105,564.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.