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Finding the Fourth Proportional to 61,420.66, 84,765.51 and 34,561.60

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Solution

The fourth proportional to 61,420.66, 84,765.51 and 34,561.60 is: 47,697.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,420.66 : 84,765.51 = 34,561.60 : x
  2. Step 2: Convert to fraction form
    61,420.66/84,765.51 = 34,561.60/x
  3. Step 3: Cross multiply
    61,420.66x = 84,765.51 × 34,561.60
  4. Step 4: Simplify right side
    61,420.66x = 2,929,631,650.42
  5. Step 5: Solve for x
    x = 2,929,631,650.42/61,420.66
  6. Step 6: Final answer
    x = 47,697.82

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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.