Home / 78,823.41-118,242.45-31,427.03

Finding the Fourth Proportional to 78,823.41, 118,242.45 and 31,427.03

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Solution

The fourth proportional to 78,823.41, 118,242.45 and 31,427.03 is: 47,143.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,823.41 : 118,242.45 = 31,427.03 : x
  2. Step 2: Convert to fraction form
    78,823.41/118,242.45 = 31,427.03/x
  3. Step 3: Cross multiply
    78,823.41x = 118,242.45 × 31,427.03
  4. Step 4: Simplify right side
    78,823.41x = 3,716,008,432.21
  5. Step 5: Solve for x
    x = 3,716,008,432.21/78,823.41
  6. Step 6: Final answer
    x = 47,143.46

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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.