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Finding the Fourth Proportional to 64,388.30, 96,582.45 and 61,107.80

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Solution

The fourth proportional to 64,388.30, 96,582.45 and 61,107.80 is: 91,661.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,388.30 : 96,582.45 = 61,107.80 : x
  2. Step 2: Convert to fraction form
    64,388.30/96,582.45 = 61,107.80/x
  3. Step 3: Cross multiply
    64,388.30x = 96,582.45 × 61,107.80
  4. Step 4: Simplify right side
    64,388.30x = 5,901,941,038.11
  5. Step 5: Solve for x
    x = 5,901,941,038.11/64,388.30
  6. Step 6: Final answer
    x = 91,661.70

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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.