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Finding the Fourth Proportional to 130,426.40, 195,639.60 and 121,613.60

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Solution

The fourth proportional to 130,426.40, 195,639.60 and 121,613.60 is: 182,420.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,426.40 : 195,639.60 = 121,613.60 : x
  2. Step 2: Convert to fraction form
    130,426.40/195,639.60 = 121,613.60/x
  3. Step 3: Cross multiply
    130,426.40x = 195,639.60 × 121,613.60
  4. Step 4: Simplify right side
    130,426.40x = 23,792,436,058.56
  5. Step 5: Solve for x
    x = 23,792,436,058.56/130,426.40
  6. Step 6: Final answer
    x = 182,420.40

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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.