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Finding the Fourth Proportional to 170,999.10, 256,498.65 and 77,687.10

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Solution

The fourth proportional to 170,999.10, 256,498.65 and 77,687.10 is: 116,530.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,999.10 : 256,498.65 = 77,687.10 : x
  2. Step 2: Convert to fraction form
    170,999.10/256,498.65 = 77,687.10/x
  3. Step 3: Cross multiply
    170,999.10x = 256,498.65 × 77,687.10
  4. Step 4: Simplify right side
    170,999.10x = 19,926,636,272.42
  5. Step 5: Solve for x
    x = 19,926,636,272.42/170,999.10
  6. Step 6: Final answer
    x = 116,530.65

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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.