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Finding the Fourth Proportional to 72,903.80, 100,607.24 and 39,369.80

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Solution

The fourth proportional to 72,903.80, 100,607.24 and 39,369.80 is: 54,330.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,903.80 : 100,607.24 = 39,369.80 : x
  2. Step 2: Convert to fraction form
    72,903.80/100,607.24 = 39,369.80/x
  3. Step 3: Cross multiply
    72,903.80x = 100,607.24 × 39,369.80
  4. Step 4: Simplify right side
    72,903.80x = 3,960,886,590.65
  5. Step 5: Solve for x
    x = 3,960,886,590.65/72,903.80
  6. Step 6: Final answer
    x = 54,330.32

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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.