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Finding the Fourth Proportional to 105,388.62, 145,441.62 and 62,392.79

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Solution

The fourth proportional to 105,388.62, 145,441.62 and 62,392.79 is: 86,105.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,388.62 : 145,441.62 = 62,392.79 : x
  2. Step 2: Convert to fraction form
    105,388.62/145,441.62 = 62,392.79/x
  3. Step 3: Cross multiply
    105,388.62x = 145,441.62 × 62,392.79
  4. Step 4: Simplify right side
    105,388.62x = 9,074,507,726.71
  5. Step 5: Solve for x
    x = 9,074,507,726.71/105,388.62
  6. Step 6: Final answer
    x = 86,105.20

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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.