Home / 157,418.12-217,241.60-85,802.78

Finding the Fourth Proportional to 157,418.12, 217,241.60 and 85,802.78

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Solution

The fourth proportional to 157,418.12, 217,241.60 and 85,802.78 is: 118,410.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,418.12 : 217,241.60 = 85,802.78 : x
  2. Step 2: Convert to fraction form
    157,418.12/217,241.60 = 85,802.78/x
  3. Step 3: Cross multiply
    157,418.12x = 217,241.60 × 85,802.78
  4. Step 4: Simplify right side
    157,418.12x = 18,639,933,325.74
  5. Step 5: Solve for x
    x = 18,639,933,325.74/157,418.12
  6. Step 6: Final answer
    x = 118,410.34

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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.