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Finding the Fourth Proportional to 103,139.80, 154,868.10 and 56,483.80

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Solution

The fourth proportional to 103,139.80, 154,868.10 and 56,483.80 is: 84,812.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,139.80 : 154,868.10 = 56,483.80 : x
  2. Step 2: Convert to fraction form
    103,139.80/154,868.10 = 56,483.80/x
  3. Step 3: Cross multiply
    103,139.80x = 154,868.10 × 56,483.80
  4. Step 4: Simplify right side
    103,139.80x = 8,747,538,786.78
  5. Step 5: Solve for x
    x = 8,747,538,786.78/103,139.80
  6. Step 6: Final answer
    x = 84,812.45

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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.