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Finding the Fourth Proportional to 261,387.62, 392,122.42 and 111,628.70

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Solution

The fourth proportional to 261,387.62, 392,122.42 and 111,628.70 is: 167,460.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,387.62 : 392,122.42 = 111,628.70 : x
  2. Step 2: Convert to fraction form
    261,387.62/392,122.42 = 111,628.70/x
  3. Step 3: Cross multiply
    261,387.62x = 392,122.42 × 111,628.70
  4. Step 4: Simplify right side
    261,387.62x = 43,772,115,985.45
  5. Step 5: Solve for x
    x = 43,772,115,985.45/261,387.62
  6. Step 6: Final answer
    x = 167,460.56

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1.5x scale

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.