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Finding the Fourth Proportional to 102,671.80, 154,122.90 and 79,401.40

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Solution

The fourth proportional to 102,671.80, 154,122.90 and 79,401.40 is: 119,191.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,671.80 : 154,122.90 = 79,401.40 : x
  2. Step 2: Convert to fraction form
    102,671.80/154,122.90 = 79,401.40/x
  3. Step 3: Cross multiply
    102,671.80x = 154,122.90 × 79,401.40
  4. Step 4: Simplify right side
    102,671.80x = 12,237,574,032.06
  5. Step 5: Solve for x
    x = 12,237,574,032.06/102,671.80
  6. Step 6: Final answer
    x = 119,191.19

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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.