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Finding the Fourth Proportional to 105,371.40, 145,415.40 and 62,954.40

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Solution

The fourth proportional to 105,371.40, 145,415.40 and 62,954.40 is: 86,878.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,371.40 : 145,415.40 = 62,954.40 : x
  2. Step 2: Convert to fraction form
    105,371.40/145,415.40 = 62,954.40/x
  3. Step 3: Cross multiply
    105,371.40x = 145,415.40 × 62,954.40
  4. Step 4: Simplify right side
    105,371.40x = 9,154,539,257.76
  5. Step 5: Solve for x
    x = 9,154,539,257.76/105,371.40
  6. Step 6: Final answer
    x = 86,878.79

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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.