Home / 78,132.19-117,203.75-38,678.71

Finding the Fourth Proportional to 78,132.19, 117,203.75 and 38,678.71

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Solution

The fourth proportional to 78,132.19, 117,203.75 and 38,678.71 is: 58,020.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,132.19 : 117,203.75 = 38,678.71 : x
  2. Step 2: Convert to fraction form
    78,132.19/117,203.75 = 38,678.71/x
  3. Step 3: Cross multiply
    78,132.19x = 117,203.75 × 38,678.71
  4. Step 4: Simplify right side
    78,132.19x = 4,533,289,857.16
  5. Step 5: Solve for x
    x = 4,533,289,857.16/78,132.19
  6. Step 6: Final answer
    x = 58,020.77

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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.