Home / 105,812.20-158,718.30-91,988.20

Finding the Fourth Proportional to 105,812.20, 158,718.30 and 91,988.20

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Solution

The fourth proportional to 105,812.20, 158,718.30 and 91,988.20 is: 137,982.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,812.20 : 158,718.30 = 91,988.20 : x
  2. Step 2: Convert to fraction form
    105,812.20/158,718.30 = 91,988.20/x
  3. Step 3: Cross multiply
    105,812.20x = 158,718.30 × 91,988.20
  4. Step 4: Simplify right side
    105,812.20x = 14,600,210,724.06
  5. Step 5: Solve for x
    x = 14,600,210,724.06/105,812.20
  6. Step 6: Final answer
    x = 137,982.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.