Home / 78,708.10-118,032.98-31,945.18

Finding the Fourth Proportional to 78,708.10, 118,032.98 and 31,945.18

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Solution

The fourth proportional to 78,708.10, 118,032.98 and 31,945.18 is: 47,905.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,708.10 : 118,032.98 = 31,945.18 : x
  2. Step 2: Convert to fraction form
    78,708.10/118,032.98 = 31,945.18/x
  3. Step 3: Cross multiply
    78,708.10x = 118,032.98 × 31,945.18
  4. Step 4: Simplify right side
    78,708.10x = 3,770,584,792.04
  5. Step 5: Solve for x
    x = 3,770,584,792.04/78,708.10
  6. Step 6: Final answer
    x = 47,905.93

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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.