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Finding the Fourth Proportional to 103,348.88, 142,579.68 and 65,040.92

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Solution

The fourth proportional to 103,348.88, 142,579.68 and 65,040.92 is: 89,730.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,348.88 : 142,579.68 = 65,040.92 : x
  2. Step 2: Convert to fraction form
    103,348.88/142,579.68 = 65,040.92/x
  3. Step 3: Cross multiply
    103,348.88x = 142,579.68 × 65,040.92
  4. Step 4: Simplify right side
    103,348.88x = 9,273,513,560.51
  5. Step 5: Solve for x
    x = 9,273,513,560.51/103,348.88
  6. Step 6: Final answer
    x = 89,730.18

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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.