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Finding the Fourth Proportional to 43,237.70, 64,868.70 and 21,051.80

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Solution

The fourth proportional to 43,237.70, 64,868.70 and 21,051.80 is: 31,583.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,237.70 : 64,868.70 = 21,051.80 : x
  2. Step 2: Convert to fraction form
    43,237.70/64,868.70 = 21,051.80/x
  3. Step 3: Cross multiply
    43,237.70x = 64,868.70 × 21,051.80
  4. Step 4: Simplify right side
    43,237.70x = 1,365,602,898.66
  5. Step 5: Solve for x
    x = 1,365,602,898.66/43,237.70
  6. Step 6: Final answer
    x = 31,583.62

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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.