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Finding the Fourth Proportional to 170,820.70, 256,461.90 and 99,816.10

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Solution

The fourth proportional to 170,820.70, 256,461.90 and 99,816.10 is: 149,859.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,820.70 : 256,461.90 = 99,816.10 : x
  2. Step 2: Convert to fraction form
    170,820.70/256,461.90 = 99,816.10/x
  3. Step 3: Cross multiply
    170,820.70x = 256,461.90 × 99,816.10
  4. Step 4: Simplify right side
    170,820.70x = 25,599,026,656.59
  5. Step 5: Solve for x
    x = 25,599,026,656.59/170,820.70
  6. Step 6: Final answer
    x = 149,859.04

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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.