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Finding the Fourth Proportional to 128,207.34, 176,936.45 and 70,851.69

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Solution

The fourth proportional to 128,207.34, 176,936.45 and 70,851.69 is: 97,781.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,207.34 : 176,936.45 = 70,851.69 : x
  2. Step 2: Convert to fraction form
    128,207.34/176,936.45 = 70,851.69/x
  3. Step 3: Cross multiply
    128,207.34x = 176,936.45 × 70,851.69
  4. Step 4: Simplify right side
    128,207.34x = 12,536,246,150.84
  5. Step 5: Solve for x
    x = 12,536,246,150.84/128,207.34
  6. Step 6: Final answer
    x = 97,781.03

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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.