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Finding the Fourth Proportional to 100,007.80, 137,945.73 and 64,141.00

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Solution

The fourth proportional to 100,007.80, 137,945.73 and 64,141.00 is: 88,472.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,007.80 : 137,945.73 = 64,141.00 : x
  2. Step 2: Convert to fraction form
    100,007.80/137,945.73 = 64,141.00/x
  3. Step 3: Cross multiply
    100,007.80x = 137,945.73 × 64,141.00
  4. Step 4: Simplify right side
    100,007.80x = 8,847,976,963.59
  5. Step 5: Solve for x
    x = 8,847,976,963.59/100,007.80
  6. Step 6: Final answer
    x = 88,472.87

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1.5x scale

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.