Home / 78,465.60-108,270-51,618.96

Finding the Fourth Proportional to 78,465.60, 108,270 and 51,618.96

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Solution

The fourth proportional to 78,465.60, 108,270 and 51,618.96 is: 71,225.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,465.60 : 108,270 = 51,618.96 : x
  2. Step 2: Convert to fraction form
    78,465.60/108,270 = 51,618.96/x
  3. Step 3: Cross multiply
    78,465.60x = 108,270 × 51,618.96
  4. Step 4: Simplify right side
    78,465.60x = 5,588,784,799.20
  5. Step 5: Solve for x
    x = 5,588,784,799.20/78,465.60
  6. Step 6: Final answer
    x = 71,225.92

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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.