Home / 105,731.12-145,920.40-67,525.76

Finding the Fourth Proportional to 105,731.12, 145,920.40 and 67,525.76

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Solution

The fourth proportional to 105,731.12, 145,920.40 and 67,525.76 is: 93,192.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,731.12 : 145,920.40 = 67,525.76 : x
  2. Step 2: Convert to fraction form
    105,731.12/145,920.40 = 67,525.76/x
  3. Step 3: Cross multiply
    105,731.12x = 145,920.40 × 67,525.76
  4. Step 4: Simplify right side
    105,731.12x = 9,853,385,011.09
  5. Step 5: Solve for x
    x = 9,853,385,011.09/105,731.12
  6. Step 6: Final answer
    x = 93,192.86

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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.