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Finding the Fourth Proportional to 72,968.96, 109,658.64 and 43,392.08

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Solution

The fourth proportional to 72,968.96, 109,658.64 and 43,392.08 is: 65,210.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,968.96 : 109,658.64 = 43,392.08 : x
  2. Step 2: Convert to fraction form
    72,968.96/109,658.64 = 43,392.08/x
  3. Step 3: Cross multiply
    72,968.96x = 109,658.64 × 43,392.08
  4. Step 4: Simplify right side
    72,968.96x = 4,758,316,479.57
  5. Step 5: Solve for x
    x = 4,758,316,479.57/72,968.96
  6. Step 6: Final answer
    x = 65,210.15

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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.