Home / 105,721.76-145,890.96-57,966.24

Finding the Fourth Proportional to 105,721.76, 145,890.96 and 57,966.24

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Solution

The fourth proportional to 105,721.76, 145,890.96 and 57,966.24 is: 79,990.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,721.76 : 145,890.96 = 57,966.24 : x
  2. Step 2: Convert to fraction form
    105,721.76/145,890.96 = 57,966.24/x
  3. Step 3: Cross multiply
    105,721.76x = 145,890.96 × 57,966.24
  4. Step 4: Simplify right side
    105,721.76x = 8,456,750,401.19
  5. Step 5: Solve for x
    x = 8,456,750,401.19/105,721.76
  6. Step 6: Final answer
    x = 79,990.63

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1.5x scale

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.