Home / 99,931.31-137,913.05-56,912.61

Finding the Fourth Proportional to 99,931.31, 137,913.05 and 56,912.61

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Solution

The fourth proportional to 99,931.31, 137,913.05 and 56,912.61 is: 78,543.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,931.31 : 137,913.05 = 56,912.61 : x
  2. Step 2: Convert to fraction form
    99,931.31/137,913.05 = 56,912.61/x
  3. Step 3: Cross multiply
    99,931.31x = 137,913.05 × 56,912.61
  4. Step 4: Simplify right side
    99,931.31x = 7,848,991,344.00
  5. Step 5: Solve for x
    x = 7,848,991,344.00/99,931.31
  6. Step 6: Final answer
    x = 78,543.87

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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.