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Finding the Fourth Proportional to 79,129.76, 109,207.85 and 45,146.63

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Solution

The fourth proportional to 79,129.76, 109,207.85 and 45,146.63 is: 62,307.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,129.76 : 109,207.85 = 45,146.63 : x
  2. Step 2: Convert to fraction form
    79,129.76/109,207.85 = 45,146.63/x
  3. Step 3: Cross multiply
    79,129.76x = 109,207.85 × 45,146.63
  4. Step 4: Simplify right side
    79,129.76x = 4,930,365,983.61
  5. Step 5: Solve for x
    x = 4,930,365,983.61/79,129.76
  6. Step 6: Final answer
    x = 62,307.35

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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.