Home / 78,275.75-117,430.63-25,683.26

Finding the Fourth Proportional to 78,275.75, 117,430.63 and 25,683.26

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Solution

The fourth proportional to 78,275.75, 117,430.63 and 25,683.26 is: 38,530.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,275.75 : 117,430.63 = 25,683.26 : x
  2. Step 2: Convert to fraction form
    78,275.75/117,430.63 = 25,683.26/x
  3. Step 3: Cross multiply
    78,275.75x = 117,430.63 × 25,683.26
  4. Step 4: Simplify right side
    78,275.75x = 3,016,000,750.89
  5. Step 5: Solve for x
    x = 3,016,000,750.89/78,275.75
  6. Step 6: Final answer
    x = 38,530.46

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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.