Home / 78,237.45-117,363.51-28,330.11

Finding the Fourth Proportional to 78,237.45, 117,363.51 and 28,330.11

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Solution

The fourth proportional to 78,237.45, 117,363.51 and 28,330.11 is: 42,497.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,237.45 : 117,363.51 = 28,330.11 : x
  2. Step 2: Convert to fraction form
    78,237.45/117,363.51 = 28,330.11/x
  3. Step 3: Cross multiply
    78,237.45x = 117,363.51 × 28,330.11
  4. Step 4: Simplify right side
    78,237.45x = 3,324,921,148.29
  5. Step 5: Solve for x
    x = 3,324,921,148.29/78,237.45
  6. Step 6: Final answer
    x = 42,497.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.