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Finding the Fourth Proportional to 79,658.66, 109,916.10 and 45,660.90

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Solution

The fourth proportional to 79,658.66, 109,916.10 and 45,660.90 is: 63,004.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,658.66 : 109,916.10 = 45,660.90 : x
  2. Step 2: Convert to fraction form
    79,658.66/109,916.10 = 45,660.90/x
  3. Step 3: Cross multiply
    79,658.66x = 109,916.10 × 45,660.90
  4. Step 4: Simplify right side
    79,658.66x = 5,018,868,050.49
  5. Step 5: Solve for x
    x = 5,018,868,050.49/79,658.66
  6. Step 6: Final answer
    x = 63,004.68

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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.