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Finding the Fourth Proportional to 102,871.40, 154,307.10 and 82,135.40

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Solution

The fourth proportional to 102,871.40, 154,307.10 and 82,135.40 is: 123,203.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,871.40 : 154,307.10 = 82,135.40 : x
  2. Step 2: Convert to fraction form
    102,871.40/154,307.10 = 82,135.40/x
  3. Step 3: Cross multiply
    102,871.40x = 154,307.10 × 82,135.40
  4. Step 4: Simplify right side
    102,871.40x = 12,674,075,381.34
  5. Step 5: Solve for x
    x = 12,674,075,381.34/102,871.40
  6. Step 6: Final answer
    x = 123,203.10

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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.