Home / 78,217.41-107,835.60-62,138.07

Finding the Fourth Proportional to 78,217.41, 107,835.60 and 62,138.07

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Solution

The fourth proportional to 78,217.41, 107,835.60 and 62,138.07 is: 85,667.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,217.41 : 107,835.60 = 62,138.07 : x
  2. Step 2: Convert to fraction form
    78,217.41/107,835.60 = 62,138.07/x
  3. Step 3: Cross multiply
    78,217.41x = 107,835.60 × 62,138.07
  4. Step 4: Simplify right side
    78,217.41x = 6,700,696,061.29
  5. Step 5: Solve for x
    x = 6,700,696,061.29/78,217.41
  6. Step 6: Final answer
    x = 85,667.58

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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.