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Finding the Fourth Proportional to 128,406.40, 192,609.60 and 97,302.40

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Solution

The fourth proportional to 128,406.40, 192,609.60 and 97,302.40 is: 145,953.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,406.40 : 192,609.60 = 97,302.40 : x
  2. Step 2: Convert to fraction form
    128,406.40/192,609.60 = 97,302.40/x
  3. Step 3: Cross multiply
    128,406.40x = 192,609.60 × 97,302.40
  4. Step 4: Simplify right side
    128,406.40x = 18,741,376,343.04
  5. Step 5: Solve for x
    x = 18,741,376,343.04/128,406.40
  6. Step 6: Final answer
    x = 145,953.60

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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.