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Finding the Fourth Proportional to 105,752.74, 145,909.20 and 68,048.86

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Solution

The fourth proportional to 105,752.74, 145,909.20 and 68,048.86 is: 93,888.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,752.74 : 145,909.20 = 68,048.86 : x
  2. Step 2: Convert to fraction form
    105,752.74/145,909.20 = 68,048.86/x
  3. Step 3: Cross multiply
    105,752.74x = 145,909.20 × 68,048.86
  4. Step 4: Simplify right side
    105,752.74x = 9,928,954,723.51
  5. Step 5: Solve for x
    x = 9,928,954,723.51/105,752.74
  6. Step 6: Final answer
    x = 93,888.39

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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.