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Finding the Fourth Proportional to 73,661.16, 110,495.52 and 21,078.40

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Solution

The fourth proportional to 73,661.16, 110,495.52 and 21,078.40 is: 31,618.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,661.16 : 110,495.52 = 21,078.40 : x
  2. Step 2: Convert to fraction form
    73,661.16/110,495.52 = 21,078.40/x
  3. Step 3: Cross multiply
    73,661.16x = 110,495.52 × 21,078.40
  4. Step 4: Simplify right side
    73,661.16x = 2,329,068,768.77
  5. Step 5: Solve for x
    x = 2,329,068,768.77/73,661.16
  6. Step 6: Final answer
    x = 31,618.68

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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.