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Finding the Fourth Proportional to 72,871.65, 109,307.50 and 28,467.27

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Solution

The fourth proportional to 72,871.65, 109,307.50 and 28,467.27 is: 42,700.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,871.65 : 109,307.50 = 28,467.27 : x
  2. Step 2: Convert to fraction form
    72,871.65/109,307.50 = 28,467.27/x
  3. Step 3: Cross multiply
    72,871.65x = 109,307.50 × 28,467.27
  4. Step 4: Simplify right side
    72,871.65x = 3,111,686,044.36
  5. Step 5: Solve for x
    x = 3,111,686,044.36/72,871.65
  6. Step 6: Final answer
    x = 42,700.91

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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.