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Finding the Fourth Proportional to 89,459.70, 123,466.05 and 57,720.93

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Solution

The fourth proportional to 89,459.70, 123,466.05 and 57,720.93 is: 79,662.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,459.70 : 123,466.05 = 57,720.93 : x
  2. Step 2: Convert to fraction form
    89,459.70/123,466.05 = 57,720.93/x
  3. Step 3: Cross multiply
    89,459.70x = 123,466.05 × 57,720.93
  4. Step 4: Simplify right side
    89,459.70x = 7,126,575,229.43
  5. Step 5: Solve for x
    x = 7,126,575,229.43/89,459.70
  6. Step 6: Final answer
    x = 79,662.41

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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.