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Finding the Fourth Proportional to 109,991.84, 151,674 and 65,271.20

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Solution

The fourth proportional to 109,991.84, 151,674 and 65,271.20 is: 90,006.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,991.84 : 151,674 = 65,271.20 : x
  2. Step 2: Convert to fraction form
    109,991.84/151,674 = 65,271.20/x
  3. Step 3: Cross multiply
    109,991.84x = 151,674 × 65,271.20
  4. Step 4: Simplify right side
    109,991.84x = 9,899,943,988.80
  5. Step 5: Solve for x
    x = 9,899,943,988.80/109,991.84
  6. Step 6: Final answer
    x = 90,006.17

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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.