Home / 103,518.40-142,813.92-65,265.36

Finding the Fourth Proportional to 103,518.40, 142,813.92 and 65,265.36

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Solution

The fourth proportional to 103,518.40, 142,813.92 and 65,265.36 is: 90,040.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,518.40 : 142,813.92 = 65,265.36 : x
  2. Step 2: Convert to fraction form
    103,518.40/142,813.92 = 65,265.36/x
  3. Step 3: Cross multiply
    103,518.40x = 142,813.92 × 65,265.36
  4. Step 4: Simplify right side
    103,518.40x = 9,320,801,901.81
  5. Step 5: Solve for x
    x = 9,320,801,901.81/103,518.40
  6. Step 6: Final answer
    x = 90,040.05

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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.