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Finding the Fourth Proportional to 79,298.98, 109,422.51 and 45,309.67

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Solution

The fourth proportional to 79,298.98, 109,422.51 and 45,309.67 is: 62,521.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,298.98 : 109,422.51 = 45,309.67 : x
  2. Step 2: Convert to fraction form
    79,298.98/109,422.51 = 45,309.67/x
  3. Step 3: Cross multiply
    79,298.98x = 109,422.51 × 45,309.67
  4. Step 4: Simplify right side
    79,298.98x = 4,957,897,818.67
  5. Step 5: Solve for x
    x = 4,957,897,818.67/79,298.98
  6. Step 6: Final answer
    x = 62,521.58

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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.