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Finding the Fourth Proportional to 99,374.63, 137,136.98 and 56,957.76

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Solution

The fourth proportional to 99,374.63, 137,136.98 and 56,957.76 is: 78,601.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,374.63 : 137,136.98 = 56,957.76 : x
  2. Step 2: Convert to fraction form
    99,374.63/137,136.98 = 56,957.76/x
  3. Step 3: Cross multiply
    99,374.63x = 137,136.98 × 56,957.76
  4. Step 4: Simplify right side
    99,374.63x = 7,811,015,336.36
  5. Step 5: Solve for x
    x = 7,811,015,336.36/99,374.63
  6. Step 6: Final answer
    x = 78,601.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.