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Finding the Fourth Proportional to 99,671.54, 137,558.40 and 56,657.49

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Solution

The fourth proportional to 99,671.54, 137,558.40 and 56,657.49 is: 78,193.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,671.54 : 137,558.40 = 56,657.49 : x
  2. Step 2: Convert to fraction form
    99,671.54/137,558.40 = 56,657.49/x
  3. Step 3: Cross multiply
    99,671.54x = 137,558.40 × 56,657.49
  4. Step 4: Simplify right side
    99,671.54x = 7,793,713,672.42
  5. Step 5: Solve for x
    x = 7,793,713,672.42/99,671.54
  6. Step 6: Final answer
    x = 78,193.97

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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.