Home / 78,440.72-117,674.04-31,041.68

Finding the Fourth Proportional to 78,440.72, 117,674.04 and 31,041.68

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Solution

The fourth proportional to 78,440.72, 117,674.04 and 31,041.68 is: 46,567.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,440.72 : 117,674.04 = 31,041.68 : x
  2. Step 2: Convert to fraction form
    78,440.72/117,674.04 = 31,041.68/x
  3. Step 3: Cross multiply
    78,440.72x = 117,674.04 × 31,041.68
  4. Step 4: Simplify right side
    78,440.72x = 3,652,799,893.99
  5. Step 5: Solve for x
    x = 3,652,799,893.99/78,440.72
  6. Step 6: Final answer
    x = 46,567.65

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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.