Home / 257,098.72-385,636.80-70,109.60

Finding the Fourth Proportional to 257,098.72, 385,636.80 and 70,109.60

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Solution

The fourth proportional to 257,098.72, 385,636.80 and 70,109.60 is: 105,161.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,098.72 : 385,636.80 = 70,109.60 : x
  2. Step 2: Convert to fraction form
    257,098.72/385,636.80 = 70,109.60/x
  3. Step 3: Cross multiply
    257,098.72x = 385,636.80 × 70,109.60
  4. Step 4: Simplify right side
    257,098.72x = 27,036,841,793.28
  5. Step 5: Solve for x
    x = 27,036,841,793.28/257,098.72
  6. Step 6: Final answer
    x = 105,161.32

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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.