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Finding the Fourth Proportional to 102,810.70, 154,216.05 and 61,338.70

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Solution

The fourth proportional to 102,810.70, 154,216.05 and 61,338.70 is: 92,008.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,810.70 : 154,216.05 = 61,338.70 : x
  2. Step 2: Convert to fraction form
    102,810.70/154,216.05 = 61,338.70/x
  3. Step 3: Cross multiply
    102,810.70x = 154,216.05 × 61,338.70
  4. Step 4: Simplify right side
    102,810.70x = 9,459,412,026.14
  5. Step 5: Solve for x
    x = 9,459,412,026.14/102,810.70
  6. Step 6: Final answer
    x = 92,008.05

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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.