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Finding the Fourth Proportional to 123,780.59, 170,812.29 and 70,076.74

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Solution

The fourth proportional to 123,780.59, 170,812.29 and 70,076.74 is: 96,703.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,780.59 : 170,812.29 = 70,076.74 : x
  2. Step 2: Convert to fraction form
    123,780.59/170,812.29 = 70,076.74/x
  3. Step 3: Cross multiply
    123,780.59x = 170,812.29 × 70,076.74
  4. Step 4: Simplify right side
    123,780.59x = 11,969,968,435.13
  5. Step 5: Solve for x
    x = 11,969,968,435.13/123,780.59
  6. Step 6: Final answer
    x = 96,703.11

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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.