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Finding the Fourth Proportional to 128,207.16, 176,921.46 and 70,843.14

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Solution

The fourth proportional to 128,207.16, 176,921.46 and 70,843.14 is: 97,761.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,207.16 : 176,921.46 = 70,843.14 : x
  2. Step 2: Convert to fraction form
    128,207.16/176,921.46 = 70,843.14/x
  3. Step 3: Cross multiply
    128,207.16x = 176,921.46 × 70,843.14
  4. Step 4: Simplify right side
    128,207.16x = 12,533,671,759.78
  5. Step 5: Solve for x
    x = 12,533,671,759.78/128,207.16
  6. Step 6: Final answer
    x = 97,761.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.