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Finding the Fourth Proportional to 64,490.40, 96,668.40 and 31,160.16

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Solution

The fourth proportional to 64,490.40, 96,668.40 and 31,160.16 is: 46,707.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,490.40 : 96,668.40 = 31,160.16 : x
  2. Step 2: Convert to fraction form
    64,490.40/96,668.40 = 31,160.16/x
  3. Step 3: Cross multiply
    64,490.40x = 96,668.40 × 31,160.16
  4. Step 4: Simplify right side
    64,490.40x = 3,012,202,810.94
  5. Step 5: Solve for x
    x = 3,012,202,810.94/64,490.40
  6. Step 6: Final answer
    x = 46,707.77

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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.