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Finding the Fourth Proportional to 72,946.65, 109,376.18 and 28,520.43

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Solution

The fourth proportional to 72,946.65, 109,376.18 and 28,520.43 is: 42,763.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,946.65 : 109,376.18 = 28,520.43 : x
  2. Step 2: Convert to fraction form
    72,946.65/109,376.18 = 28,520.43/x
  3. Step 3: Cross multiply
    72,946.65x = 109,376.18 × 28,520.43
  4. Step 4: Simplify right side
    72,946.65x = 3,119,455,542.76
  5. Step 5: Solve for x
    x = 3,119,455,542.76/72,946.65
  6. Step 6: Final answer
    x = 42,763.52

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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.