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Finding the Fourth Proportional to 243,640.21, 365,512.47 and 72,875.32

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Solution

The fourth proportional to 243,640.21, 365,512.47 and 72,875.32 is: 109,328.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,640.21 : 365,512.47 = 72,875.32 : x
  2. Step 2: Convert to fraction form
    243,640.21/365,512.47 = 72,875.32/x
  3. Step 3: Cross multiply
    243,640.21x = 365,512.47 × 72,875.32
  4. Step 4: Simplify right side
    243,640.21x = 26,636,838,215.24
  5. Step 5: Solve for x
    x = 26,636,838,215.24/243,640.21
  6. Step 6: Final answer
    x = 109,328.58

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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.