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Finding the Fourth Proportional to 137,037.50, 189,113.16 and 76,611.50

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Solution

The fourth proportional to 137,037.50, 189,113.16 and 76,611.50 is: 105,724.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,037.50 : 189,113.16 = 76,611.50 : x
  2. Step 2: Convert to fraction form
    137,037.50/189,113.16 = 76,611.50/x
  3. Step 3: Cross multiply
    137,037.50x = 189,113.16 × 76,611.50
  4. Step 4: Simplify right side
    137,037.50x = 14,488,242,947.07
  5. Step 5: Solve for x
    x = 14,488,242,947.07/137,037.50
  6. Step 6: Final answer
    x = 105,724.66

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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.