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Finding the Fourth Proportional to 72,594.40, 100,359.92 and 71,929.40

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Solution

The fourth proportional to 72,594.40, 100,359.92 and 71,929.40 is: 99,440.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,594.40 : 100,359.92 = 71,929.40 : x
  2. Step 2: Convert to fraction form
    72,594.40/100,359.92 = 71,929.40/x
  3. Step 3: Cross multiply
    72,594.40x = 100,359.92 × 71,929.40
  4. Step 4: Simplify right side
    72,594.40x = 7,218,828,829.65
  5. Step 5: Solve for x
    x = 7,218,828,829.65/72,594.40
  6. Step 6: Final answer
    x = 99,440.57

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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.