Home / 130,778.88-180,470.16-74,201.28

Finding the Fourth Proportional to 130,778.88, 180,470.16 and 74,201.28

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Solution

The fourth proportional to 130,778.88, 180,470.16 and 74,201.28 is: 102,395.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,778.88 : 180,470.16 = 74,201.28 : x
  2. Step 2: Convert to fraction form
    130,778.88/180,470.16 = 74,201.28/x
  3. Step 3: Cross multiply
    130,778.88x = 180,470.16 × 74,201.28
  4. Step 4: Simplify right side
    130,778.88x = 13,391,116,873.80
  5. Step 5: Solve for x
    x = 13,391,116,873.80/130,778.88
  6. Step 6: Final answer
    x = 102,395.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.