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Finding the Fourth Proportional to 100,894.08, 139,233.80 and 58,477.20

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Solution

The fourth proportional to 100,894.08, 139,233.80 and 58,477.20 is: 80,698.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,894.08 : 139,233.80 = 58,477.20 : x
  2. Step 2: Convert to fraction form
    100,894.08/139,233.80 = 58,477.20/x
  3. Step 3: Cross multiply
    100,894.08x = 139,233.80 × 58,477.20
  4. Step 4: Simplify right side
    100,894.08x = 8,142,002,769.36
  5. Step 5: Solve for x
    x = 8,142,002,769.36/100,894.08
  6. Step 6: Final answer
    x = 80,698.52

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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.