Home / 78,281.64-117,421.10-31,533.32

Finding the Fourth Proportional to 78,281.64, 117,421.10 and 31,533.32

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Solution

The fourth proportional to 78,281.64, 117,421.10 and 31,533.32 is: 47,299.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,281.64 : 117,421.10 = 31,533.32 : x
  2. Step 2: Convert to fraction form
    78,281.64/117,421.10 = 31,533.32/x
  3. Step 3: Cross multiply
    78,281.64x = 117,421.10 × 31,533.32
  4. Step 4: Simplify right side
    78,281.64x = 3,702,677,121.05
  5. Step 5: Solve for x
    x = 3,702,677,121.05/78,281.64
  6. Step 6: Final answer
    x = 47,299.43

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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.