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Finding the Fourth Proportional to 100,904.96, 139,248.88 and 58,488.12

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Solution

The fourth proportional to 100,904.96, 139,248.88 and 58,488.12 is: 80,713.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,904.96 : 139,248.88 = 58,488.12 : x
  2. Step 2: Convert to fraction form
    100,904.96/139,248.88 = 58,488.12/x
  3. Step 3: Cross multiply
    100,904.96x = 139,248.88 × 58,488.12
  4. Step 4: Simplify right side
    100,904.96x = 8,144,405,203.31
  5. Step 5: Solve for x
    x = 8,144,405,203.31/100,904.96
  6. Step 6: Final answer
    x = 80,713.63

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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.