Home / 128,940.48-193,320-49,988.16

Finding the Fourth Proportional to 128,940.48, 193,320 and 49,988.16

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Solution

The fourth proportional to 128,940.48, 193,320 and 49,988.16 is: 74,947.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,940.48 : 193,320 = 49,988.16 : x
  2. Step 2: Convert to fraction form
    128,940.48/193,320 = 49,988.16/x
  3. Step 3: Cross multiply
    128,940.48x = 193,320 × 49,988.16
  4. Step 4: Simplify right side
    128,940.48x = 9,663,711,091.20
  5. Step 5: Solve for x
    x = 9,663,711,091.20/128,940.48
  6. Step 6: Final answer
    x = 74,947.07

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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.