Home / 72,989.30-100,725.32-42,768.61

Finding the Fourth Proportional to 72,989.30, 100,725.32 and 42,768.61

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Solution

The fourth proportional to 72,989.30, 100,725.32 and 42,768.61 is: 59,020.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,989.30 : 100,725.32 = 42,768.61 : x
  2. Step 2: Convert to fraction form
    72,989.30/100,725.32 = 42,768.61/x
  3. Step 3: Cross multiply
    72,989.30x = 100,725.32 × 42,768.61
  4. Step 4: Simplify right side
    72,989.30x = 4,307,881,462.55
  5. Step 5: Solve for x
    x = 4,307,881,462.55/72,989.30
  6. Step 6: Final answer
    x = 59,020.72

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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.