Home / 78,023.28-117,034.38-31,275.48

Finding the Fourth Proportional to 78,023.28, 117,034.38 and 31,275.48

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Solution

The fourth proportional to 78,023.28, 117,034.38 and 31,275.48 is: 46,913.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,023.28 : 117,034.38 = 31,275.48 : x
  2. Step 2: Convert to fraction form
    78,023.28/117,034.38 = 31,275.48/x
  3. Step 3: Cross multiply
    78,023.28x = 117,034.38 × 31,275.48
  4. Step 4: Simplify right side
    78,023.28x = 3,660,306,411.00
  5. Step 5: Solve for x
    x = 3,660,306,411.00/78,023.28
  6. Step 6: Final answer
    x = 46,913.00

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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.