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Finding the Fourth Proportional to 102,905.80, 154,358.70 and 62,816.20

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Solution

The fourth proportional to 102,905.80, 154,358.70 and 62,816.20 is: 94,224.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,905.80 : 154,358.70 = 62,816.20 : x
  2. Step 2: Convert to fraction form
    102,905.80/154,358.70 = 62,816.20/x
  3. Step 3: Cross multiply
    102,905.80x = 154,358.70 × 62,816.20
  4. Step 4: Simplify right side
    102,905.80x = 9,696,226,970.94
  5. Step 5: Solve for x
    x = 9,696,226,970.94/102,905.80
  6. Step 6: Final answer
    x = 94,224.30

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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.