Home / 130,716.72-180,389.07-74,128.11

Finding the Fourth Proportional to 130,716.72, 180,389.07 and 74,128.11

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Solution

The fourth proportional to 130,716.72, 180,389.07 and 74,128.11 is: 102,296.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,716.72 : 180,389.07 = 74,128.11 : x
  2. Step 2: Convert to fraction form
    130,716.72/180,389.07 = 74,128.11/x
  3. Step 3: Cross multiply
    130,716.72x = 180,389.07 × 74,128.11
  4. Step 4: Simplify right side
    130,716.72x = 13,371,900,823.76
  5. Step 5: Solve for x
    x = 13,371,900,823.76/130,716.72
  6. Step 6: Final answer
    x = 102,296.79

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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.