Home / 78,326.64-117,459.36-28,391.76

Finding the Fourth Proportional to 78,326.64, 117,459.36 and 28,391.76

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Solution

The fourth proportional to 78,326.64, 117,459.36 and 28,391.76 is: 42,576.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,326.64 : 117,459.36 = 28,391.76 : x
  2. Step 2: Convert to fraction form
    78,326.64/117,459.36 = 28,391.76/x
  3. Step 3: Cross multiply
    78,326.64x = 117,459.36 × 28,391.76
  4. Step 4: Simplify right side
    78,326.64x = 3,334,877,958.87
  5. Step 5: Solve for x
    x = 3,334,877,958.87/78,326.64
  6. Step 6: Final answer
    x = 42,576.55

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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.