Home / 78,719.64-108,632.52-42,909.54

Finding the Fourth Proportional to 78,719.64, 108,632.52 and 42,909.54

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Solution

The fourth proportional to 78,719.64, 108,632.52 and 42,909.54 is: 59,214.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,719.64 : 108,632.52 = 42,909.54 : x
  2. Step 2: Convert to fraction form
    78,719.64/108,632.52 = 42,909.54/x
  3. Step 3: Cross multiply
    78,719.64x = 108,632.52 × 42,909.54
  4. Step 4: Simplify right side
    78,719.64x = 4,661,371,462.24
  5. Step 5: Solve for x
    x = 4,661,371,462.24/78,719.64
  6. Step 6: Final answer
    x = 59,214.85

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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.