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Finding the Fourth Proportional to 121,765.38, 182,666.30 and 42,865.72

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Solution

The fourth proportional to 121,765.38, 182,666.30 and 42,865.72 is: 64,305.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,765.38 : 182,666.30 = 42,865.72 : x
  2. Step 2: Convert to fraction form
    121,765.38/182,666.30 = 42,865.72/x
  3. Step 3: Cross multiply
    121,765.38x = 182,666.30 × 42,865.72
  4. Step 4: Simplify right side
    121,765.38x = 7,830,122,469.24
  5. Step 5: Solve for x
    x = 7,830,122,469.24/121,765.38
  6. Step 6: Final answer
    x = 64,305.00

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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.