Home / 78,683.47-118,043.65-31,301.25

Finding the Fourth Proportional to 78,683.47, 118,043.65 and 31,301.25

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Solution

The fourth proportional to 78,683.47, 118,043.65 and 31,301.25 is: 46,959.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,683.47 : 118,043.65 = 31,301.25 : x
  2. Step 2: Convert to fraction form
    78,683.47/118,043.65 = 31,301.25/x
  3. Step 3: Cross multiply
    78,683.47x = 118,043.65 × 31,301.25
  4. Step 4: Simplify right side
    78,683.47x = 3,694,913,799.56
  5. Step 5: Solve for x
    x = 3,694,913,799.56/78,683.47
  6. Step 6: Final answer
    x = 46,959.21

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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.