Home / 128,402.39-192,445.83-72,124.20

Finding the Fourth Proportional to 128,402.39, 192,445.83 and 72,124.20

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Solution

The fourth proportional to 128,402.39, 192,445.83 and 72,124.20 is: 108,097.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,402.39 : 192,445.83 = 72,124.20 : x
  2. Step 2: Convert to fraction form
    128,402.39/192,445.83 = 72,124.20/x
  3. Step 3: Cross multiply
    128,402.39x = 192,445.83 × 72,124.20
  4. Step 4: Simplify right side
    128,402.39x = 13,880,001,532.09
  5. Step 5: Solve for x
    x = 13,880,001,532.09/128,402.39
  6. Step 6: Final answer
    x = 108,097.69

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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.