Home / 102,705.10-154,057.65-72,637.90

Finding the Fourth Proportional to 102,705.10, 154,057.65 and 72,637.90

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Solution

The fourth proportional to 102,705.10, 154,057.65 and 72,637.90 is: 108,956.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,705.10 : 154,057.65 = 72,637.90 : x
  2. Step 2: Convert to fraction form
    102,705.10/154,057.65 = 72,637.90/x
  3. Step 3: Cross multiply
    102,705.10x = 154,057.65 × 72,637.90
  4. Step 4: Simplify right side
    102,705.10x = 11,190,424,174.94
  5. Step 5: Solve for x
    x = 11,190,424,174.94/102,705.10
  6. Step 6: Final answer
    x = 108,956.85

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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.