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Finding the Fourth Proportional to 170,999.90, 256,499.85 and 103,640.30

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Solution

The fourth proportional to 170,999.90, 256,499.85 and 103,640.30 is: 155,460.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,999.90 : 256,499.85 = 103,640.30 : x
  2. Step 2: Convert to fraction form
    170,999.90/256,499.85 = 103,640.30/x
  3. Step 3: Cross multiply
    170,999.90x = 256,499.85 × 103,640.30
  4. Step 4: Simplify right side
    170,999.90x = 26,583,721,403.96
  5. Step 5: Solve for x
    x = 26,583,721,403.96/170,999.90
  6. Step 6: Final answer
    x = 155,460.45

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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.