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Finding the Fourth Proportional to 128,568.08, 192,070.28 and 83,220.03

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Solution

The fourth proportional to 128,568.08, 192,070.28 and 83,220.03 is: 124,323.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,568.08 : 192,070.28 = 83,220.03 : x
  2. Step 2: Convert to fraction form
    128,568.08/192,070.28 = 83,220.03/x
  3. Step 3: Cross multiply
    128,568.08x = 192,070.28 × 83,220.03
  4. Step 4: Simplify right side
    128,568.08x = 15,984,094,671.76
  5. Step 5: Solve for x
    x = 15,984,094,671.76/128,568.08
  6. Step 6: Final answer
    x = 124,323.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.