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Finding the Fourth Proportional to 261,072.60, 391,608.90 and 64,080.60

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Solution

The fourth proportional to 261,072.60, 391,608.90 and 64,080.60 is: 96,120.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,072.60 : 391,608.90 = 64,080.60 : x
  2. Step 2: Convert to fraction form
    261,072.60/391,608.90 = 64,080.60/x
  3. Step 3: Cross multiply
    261,072.60x = 391,608.90 × 64,080.60
  4. Step 4: Simplify right side
    261,072.60x = 25,094,533,277.34
  5. Step 5: Solve for x
    x = 25,094,533,277.34/261,072.60
  6. Step 6: Final answer
    x = 96,120.90

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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.