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Finding the Fourth Proportional to 100,823.30, 139,127.91 and 58,384.58

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Solution

The fourth proportional to 100,823.30, 139,127.91 and 58,384.58 is: 80,565.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,823.30 : 139,127.91 = 58,384.58 : x
  2. Step 2: Convert to fraction form
    100,823.30/139,127.91 = 58,384.58/x
  3. Step 3: Cross multiply
    100,823.30x = 139,127.91 × 58,384.58
  4. Step 4: Simplify right side
    100,823.30x = 8,122,924,591.63
  5. Step 5: Solve for x
    x = 8,122,924,591.63/100,823.30
  6. Step 6: Final answer
    x = 80,565.95

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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.