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Finding the Fourth Proportional to 144,810.60, 217,361.70 and 69,990.90

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Solution

The fourth proportional to 144,810.60, 217,361.70 and 69,990.90 is: 105,056.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,810.60 : 217,361.70 = 69,990.90 : x
  2. Step 2: Convert to fraction form
    144,810.60/217,361.70 = 69,990.90/x
  3. Step 3: Cross multiply
    144,810.60x = 217,361.70 × 69,990.90
  4. Step 4: Simplify right side
    144,810.60x = 15,213,341,008.53
  5. Step 5: Solve for x
    x = 15,213,341,008.53/144,810.60
  6. Step 6: Final answer
    x = 105,056.82

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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.