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Finding the Fourth Proportional to 170,912.40, 256,368.60 and 72,403.60

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Solution

The fourth proportional to 170,912.40, 256,368.60 and 72,403.60 is: 108,605.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,912.40 : 256,368.60 = 72,403.60 : x
  2. Step 2: Convert to fraction form
    170,912.40/256,368.60 = 72,403.60/x
  3. Step 3: Cross multiply
    170,912.40x = 256,368.60 × 72,403.60
  4. Step 4: Simplify right side
    170,912.40x = 18,562,009,566.96
  5. Step 5: Solve for x
    x = 18,562,009,566.96/170,912.40
  6. Step 6: Final answer
    x = 108,605.40

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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.