Home / 128,541.20-192,730.80-53,713.40

Finding the Fourth Proportional to 128,541.20, 192,730.80 and 53,713.40

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Solution

The fourth proportional to 128,541.20, 192,730.80 and 53,713.40 is: 80,536.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,541.20 : 192,730.80 = 53,713.40 : x
  2. Step 2: Convert to fraction form
    128,541.20/192,730.80 = 53,713.40/x
  3. Step 3: Cross multiply
    128,541.20x = 192,730.80 × 53,713.40
  4. Step 4: Simplify right side
    128,541.20x = 10,352,226,552.72
  5. Step 5: Solve for x
    x = 10,352,226,552.72/128,541.20
  6. Step 6: Final answer
    x = 80,536.25

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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.