Home / 83,971.40-125,989.92-31,368.60

Finding the Fourth Proportional to 83,971.40, 125,989.92 and 31,368.60

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Solution

The fourth proportional to 83,971.40, 125,989.92 and 31,368.60 is: 47,065.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,971.40 : 125,989.92 = 31,368.60 : x
  2. Step 2: Convert to fraction form
    83,971.40/125,989.92 = 31,368.60/x
  3. Step 3: Cross multiply
    83,971.40x = 125,989.92 × 31,368.60
  4. Step 4: Simplify right side
    83,971.40x = 3,952,127,404.51
  5. Step 5: Solve for x
    x = 3,952,127,404.51/83,971.40
  6. Step 6: Final answer
    x = 47,065.16

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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.