Home / 78,686.05-118,078.28-31,938.93

Finding the Fourth Proportional to 78,686.05, 118,078.28 and 31,938.93

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Solution

The fourth proportional to 78,686.05, 118,078.28 and 31,938.93 is: 47,928.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,686.05 : 118,078.28 = 31,938.93 : x
  2. Step 2: Convert to fraction form
    78,686.05/118,078.28 = 31,938.93/x
  3. Step 3: Cross multiply
    78,686.05x = 118,078.28 × 31,938.93
  4. Step 4: Simplify right side
    78,686.05x = 3,771,293,919.44
  5. Step 5: Solve for x
    x = 3,771,293,919.44/78,686.05
  6. Step 6: Final answer
    x = 47,928.37

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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.