Home / 105,782.08-145,865.28-80,335.36

Finding the Fourth Proportional to 105,782.08, 145,865.28 and 80,335.36

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Solution

The fourth proportional to 105,782.08, 145,865.28 and 80,335.36 is: 110,776.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,782.08 : 145,865.28 = 80,335.36 : x
  2. Step 2: Convert to fraction form
    105,782.08/145,865.28 = 80,335.36/x
  3. Step 3: Cross multiply
    105,782.08x = 145,865.28 × 80,335.36
  4. Step 4: Simplify right side
    105,782.08x = 11,718,139,780.30
  5. Step 5: Solve for x
    x = 11,718,139,780.30/105,782.08
  6. Step 6: Final answer
    x = 110,776.23

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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.